530 Physik
Refine
Year of publication
Document Type
- Article (1003) (remove)
Keywords
- diffusion (27)
- anomalous diffusion (24)
- gamma rays: general (20)
- cosmic rays (13)
- ISM: supernova remnants (12)
- stars: massive (11)
- organic solar cells (9)
- stars: atmospheres (9)
- astroparticle physics (8)
- methods: numerical (8)
- perovskite solar cells (8)
- acceleration of particles (7)
- galaxies: formation (7)
- stars: early-type (7)
- Magellanic Clouds (6)
- X-rays: binaries (6)
- galaxies: active (6)
- galaxies: evolution (6)
- radiation mechanisms: non-thermal (6)
- stochastic processes (6)
- turbulence (6)
- Residual stress (5)
- dynamics (5)
- fractional Brownian motion (5)
- galaxies: high-redshift (5)
- gamma rays: ISM (5)
- gamma rays: galaxies (5)
- intergalactic medium (5)
- stars: evolution (5)
- stars: neutron (5)
- Galaxy: halo (4)
- ISM: abundances (4)
- X-rays: stars (4)
- additive manufacturing (4)
- binaries: close (4)
- binaries: general (4)
- binaries: spectroscopic (4)
- catalogs (4)
- charge transport (4)
- chemotaxis (4)
- first-passage time (4)
- galaxies: star formation (4)
- instabilities (4)
- methods: data analysis (4)
- model (4)
- non-fullerene acceptors (4)
- organic photovoltaics (4)
- photochemistry (4)
- quasars: absorption lines (4)
- residual stress (4)
- stars: winds, outflows (4)
- subdwarfs (4)
- synchronization (4)
- techniques: imaging spectroscopy (4)
- techniques: spectroscopic (4)
- Aluminum alloys (3)
- Brownian motion (3)
- Fokker-Planck equation (3)
- Galaxy: evolution (3)
- ISM: clouds (3)
- Langevin equation (3)
- Lasers (3)
- Levy walk (3)
- MHD (3)
- Neutron diffraction (3)
- Phonons (3)
- Solar cells (3)
- Ti-6Al-4V (3)
- X-ray (3)
- X-ray refraction (3)
- astrophysical plasmas (3)
- dark ages, reionization, first stars (3)
- density (3)
- dust (3)
- electrons (3)
- first passage (3)
- first passage time (3)
- first-passage (3)
- galaxies: interactions (3)
- galaxies: jets (3)
- gamma rays: stars (3)
- gamma-ray burst: general (3)
- geometric Brownian motion (3)
- gravitational waves (3)
- hysteresis (3)
- magnetic fields (3)
- magnetosphere (3)
- methods: observational (3)
- networks (3)
- neutrinos (3)
- neutron diffraction (3)
- nonergodicity (3)
- oscillations (3)
- photocurrent generation (3)
- photoluminescence (3)
- photovoltaics (3)
- polymer solar cells (3)
- pulsars: general (3)
- quasars: general (3)
- recombination (3)
- scattering (3)
- shock waves (3)
- solar wind (3)
- stars: Wolf-Rayet (3)
- stars: abundances (3)
- stochastic resetting (3)
- superstatistics (3)
- techniques: image processing (3)
- transport (3)
- 2D perovskites (2)
- 4 (2)
- ARPES (2)
- Additive manufacturing (2)
- Blocking (2)
- Boltzmann distribution (2)
- Bragg peak (2)
- Chromosphere (2)
- Comb model (2)
- Computed tomography (2)
- Coupled oscillators (2)
- Crystal lattices (2)
- Curie transition (2)
- Doping (2)
- Dynamical systems (2)
- Electrical properties and parameters (2)
- Energy (2)
- Equilibrium-line altitudes (2)
- FLASH (2)
- Gaussian processes (2)
- Genetic programming (2)
- Granulation (2)
- H II regions (2)
- Heterostructures (2)
- Hilbert transform (2)
- Holocene (2)
- Hysteresis (2)
- ISM (2)
- ISM: kinematics and dynamics (2)
- ISM: magnetic fields (2)
- ISM: structure (2)
- Instrumentation and data management (2)
- Kuramoto (2)
- Kuramoto model (2)
- LIBS (2)
- Levy flights (2)
- Levy walks (2)
- Löschkurve (2)
- Magnetism (2)
- Mesoporous silicon (2)
- Molecules (2)
- NAP-XPS (2)
- Network reconstruction (2)
- Nitrogen (2)
- Optoelectronics (2)
- Organic semiconductors (2)
- P(VDF-TrFE-CFE) terpolymer (2)
- Perovskites (2)
- Photosphere (2)
- Radiation belts (2)
- Raman spectroscopy (2)
- Resonanzenergietransfer (2)
- Schrodinger operators (2)
- Statistical Physics (2)
- Statistical and Nonlinear Physics (2)
- Sun: activity (2)
- Sun: chromosphere (2)
- Synchronization control (2)
- TIG-welding (2)
- Theorie von Förster (2)
- Thermal effects (2)
- Thin films (2)
- Ultrafast X-ray diffraction (2)
- Wechselwirkungsabstand (2)
- X-ray photoelectron spectroscopy (2)
- XPS (2)
- astronomical databases (2)
- behavior (2)
- biological physics (2)
- biological transport (2)
- bumps (2)
- charge generation (2)
- charge-transfer (2)
- climate (2)
- collective motion (2)
- comets: general (2)
- comets: individual: 67P/Churyumov-Gerasimenko (2)
- complex networks (2)
- computed tomography (2)
- conductivity (2)
- control (2)
- convection (2)
- coupled rotators (2)
- creep (2)
- crystal structure (2)
- data analysis (2)
- dielectric relaxation spectroscopy (2)
- diffusing diffusivity (2)
- dwarfs galaxies (2)
- dynamo (2)
- electrostatic interactions (2)
- entanglement (2)
- first-hitting time (2)
- flexibility (2)
- fractal derivative (2)
- galaxies (2)
- galaxies: ISM (2)
- galaxies: abundances (2)
- galaxies: haloes (2)
- galaxies: nuclei (2)
- galaxies: starburst (2)
- gamma-rays: galaxies (2)
- genomic DNA conformation (2)
- globular clusters: general (2)
- graphene (2)
- graphs (2)
- group field theory (2)
- impact (2)
- infrared thermography (2)
- interaction distance (2)
- interface recombination (2)
- iron (2)
- laser powder bed fusion (2)
- memory effects (2)
- morphology (2)
- nanoparticles (2)
- neural networks (2)
- neutron (2)
- neutron stars (2)
- noise (2)
- noisy systems (2)
- non-Langevin recombination (2)
- nonfullerene acceptors (2)
- numerical relativity (2)
- optics (2)
- outflows (2)
- phase transition (2)
- photoelectron spectroscopy (2)
- physics (2)
- planets and satellites: rings (2)
- plasma instabilities (2)
- plasmas (2)
- power spectral analysis (2)
- processing (2)
- professional knowledge (2)
- quantum field theory (2)
- quantum thermodynamics (2)
- quasi-Fermi level splitting (2)
- quenching curve (2)
- radiation belts (2)
- random diffusivity (2)
- relativistic processes (2)
- resonant energy transfer (2)
- selective laser melting (SLM) (2)
- solar cells (2)
- stars: AGB and post-AGB (2)
- stars: activity (2)
- stars: black holes (2)
- stars: chemically peculiar (2)
- stars: emission-line, Be (2)
- stars: fundamental parameters (2)
- stars: kinematics and dynamics (2)
- stars: low-mass (2)
- stars: magnetic field (2)
- stars: mass-loss (2)
- stars: rotation (2)
- stars: solar-type (2)
- stars: winds (2)
- statistical models (2)
- statistische Modelle (2)
- subdiffusion (2)
- submillimetre: ISM (2)
- sulfur (2)
- surface (2)
- surveys (2)
- synchronization transition (2)
- synchrotron X-ray diffraction (2)
- systems (2)
- theory of Förster (2)
- thermal (2)
- thermal expansion (2)
- thermodynamics (2)
- thick junctions (2)
- time-series analysis (2)
- transient chaos (2)
- ultrafast dynamics (2)
- ultraviolet: ISM (2)
- voltage losses (2)
- waves (2)
- work function (2)
- (TSNMRS) (1)
- (high-)voltage measurements (1)
- (magnetohydrodynamics) MHD (1)
- 1,3,4-oxadiazole (1)
- 15 (1)
- 16 (1)
- 30S subunit (1)
- 3D printing (1)
- 3D tomography (1)
- AG (1)
- AI (1)
- APCI (1)
- ARTOF (1)
- Absorption (1)
- Accelerator mass spectrometry (1)
- Actin cytoskeleton dynamics (1)
- Adam-Delbruck scenario (1)
- Adaptation (1)
- Adaptive (1)
- Aggregate states (1)
- All-polymer heterojunctions (1)
- Alloy 718 (1)
- Alternating copolymers (1)
- Amazon rainforest (1)
- Ambipolar charge transport (1)
- Ambipolar materials (1)
- Anisotropy (1)
- Annealing (metallurgy) (1)
- Annealing treatment (1)
- Anomalous diffusion (1)
- Anomalous diffusion exponent (1)
- Anomalous transport (1)
- Answer Set Programming (1)
- Anthropocene (1)
- Approximation algorithms (1)
- Aqueous solution (1)
- Arabidopsis thaliana (1)
- Aromatic compounds (1)
- Array Seismology (1)
- Array design (1)
- Asia (1)
- Astroparticle physics (1)
- Astrophysics (1)
- Asymmetric warming (1)
- Atlantic Meridional Overturning Circulation (1)
- Atlantic meridional overturning circulation (1)
- Atomic force microscopy (1)
- Auger decay (1)
- Auger electron spectroscopy (1)
- Auger–Meitner (1)
- BESSY II (1)
- BL Lacertae objects: individual (1)
- BL Lacertae objects: individual (B2 1215+30, VER J1217+301) (1)
- BL Lacertae objects: individual (BL Lacertae = VER J2202+422) (1)
- BL Lacertae objects: individual (HESS J1943+213, VER J1943+213) (1)
- BL Lacertae objects: individual (Mrk 501) (1)
- BL Lacertae objects: individual (TXS 0506+056, VER J0509+057) (1)
- BL Lacertae objects: individual: Markarian 501 (1)
- Backbone modifications (1)
- Bayesian Model Averaging (1)
- Beam dynamics (1)
- Bessel functions (1)
- Beta-eucryptite (1)
- Big Data (1)
- Bilayer solar cells (1)
- Biological Physics (1)
- Biomimetic sensors (1)
- Black– Scholes model (1)
- Bloch-Torrey equation (1)
- Boolean model (1)
- Booster cavity (1)
- Boundary value problem (1)
- Breathing chimera states (1)
- Brownian motors (1)
- Brownian yet non-Gaussian diffusion (1)
- C-13 chemical shift (1)
- C60 (1)
- CDA (1)
- CH3NH3SnI3 (1)
- CMAS (1)
- COVID-19 (1)
- CRNS (1)
- CU (1)
- Caccioppoli inequality (1)
- Capacitance spectroscopy (1)
- Carrier dynamics (1)
- Cassini (1)
- Catalysis (1)
- Cations (1)
- Cattaneo equation (1)
- Ce/Zr (1)
- Cellular polypropylene (PP) (1)
- Central asia (1)
- Ceramics (1)
- Chaos synchronization (1)
- Charge separation (1)
- Charge-transfer state (1)
- Chebyshev inequality (1)
- Chorus waves (1)
- Chromosphere, quiet (1)
- Climate modeling (1)
- Coherence-incoherence (1)
- Cohesive finite elements (1)
- Colorimetric analysis (1)
- Comb-lattice model (1)
- Comets (1)
- Comets composition (1)
- Comets nucleus (1)
- Communications/decision making (1)
- Complementarity (1)
- Complete asymptotics (1)
- Complexity theory (1)
- Computational chemistry (1)
- Concentrating solar power (CSP) (1)
- Conducting polymers (1)
- Conformational disorder (1)
- Continuum (1)
- Convolutional neural networks (1)
- Cosmogenic isotopes (1)
- Cosmogenic nuclides (1)
- Coster–Kronig (1)
- Covalent interaction (1)
- Creep (1)
- Crystalline phases (1)
- Crystallization (1)
- CuI (1)
- Curie-transition (1)
- Cw electron beam (1)
- Cyclones (1)
- Cylindrical comb (1)
- DIC (1)
- DLR equations (1)
- DNA (1)
- DNA-PAINT (1)
- Damage (1)
- Data analysis (1)
- Data assimilation (1)
- Data-driven modelling (1)
- Debye screening (1)
- Deep learning (1)
- Defects (1)
- Dehnung (1)
- Deimos (1)
- Detergent (1)
- Dictyostelium (1)
- Dictyostelium discoideum (1)
- Dielectric hysteresis (1)
- Diffraction (1)
- Diffusion (1)
- Diffusion NMR (1)
- Diffusion coefficients (1)
- Dislocation motion (1)
- Disorder (1)
- Disperse dyes (1)
- Dispersion force (1)
- Distributed (1)
- DoS (1)
- Donor-Acceptor (DA) interface (1)
- Donor-acceptor copolymers (1)
- Doped semiconductors (1)
- Double-jet (1)
- Druck-Volumen-Änderung (1)
- Drude model (1)
- Dye transfer (1)
- Dynamic loading (1)
- Dynamical invariants (1)
- E-ring (1)
- E.coli (1)
- E7 (1)
- EMIC (1)
- Earth System trajectories (1)
- Econophysics (1)
- Edwards-Anderson order parameter (1)
- Elasticity (1)
- Electrets (1)
- Electric polarization (1)
- Electric potential (1)
- Electrochemistry (1)
- Electron back-scattered diffraction (1)
- Electron populations (1)
- Electron traps (1)
- Electronic noise (1)
- Electronic properties and materials (1)
- Electronics, photonics and device physics (1)
- Elektrostatische Wechselwirkung (1)
- Embedding (1)
- Emergency (1)
- Emergency response (1)
- Energetic disorder (1)
- Energy science and technology (1)
- Energy-level alignment (1)
- Epidemic spreading models (1)
- Epoxy resin (1)
- Epoxy resins (1)
- Equatorial ionosphere (1)
- Equilibrium (1)
- Essential spectrum (1)
- European storm-time model (1)
- Exchange bias (1)
- Excited-state calculations; (1)
- Experimental techniques (1)
- Explainable AI (1)
- External quantum efficiency (1)
- Extreme events (1)
- Extreme precipitation (1)
- False negative (1)
- False positive (1)
- Fe2TiO5 (1)
- Femtosecond lasers (1)
- Fermi-level alignment (1)
- Fermi-level pinning (1)
- Ferrimagnetism (1)
- Ferrimagnets (1)
- Field emission (1)
- Field experiments (1)
- Flashing ratchets (1)
- Flims (1)
- Fluorescence (1)
- Fokker– Planck equation (1)
- Forcemyography (1)
- Fortuin-Kasteleyn representation (1)
- Fox H-function (1)
- Fox H-functions (1)
- Fractal (1)
- Fractal dimension (1)
- Fractional Brownian motion (1)
- Frank-Condon analysis (1)
- Free-electron-laser science (1)
- Functional dependencies (1)
- Functional scaffolds (1)
- GEANT4 modeling (1)
- GMR sensors (1)
- Galaxies: high-redshift (1)
- Galaxies: interactions (1)
- Galaxy: center (1)
- Galaxy: general (1)
- Galaxy: structure (1)
- Gardner equation (1)
- Gas phase (1)
- Generalized Langevin equation (1)
- Geomagnetic secular variation (1)
- Gibbs point process (1)
- Ginzburg-Landau lattice (1)
- Glaciation (1)
- Glaciation Central Asia (1)
- Gold (1)
- Gold@polydopamine (1)
- Granite (1)
- Gravitation (1)
- Green function (1)
- Green's function (1)
- Greenland (1)
- Green’ s functions (1)
- HALS (1)
- HRTEM (1)
- HTL (1)
- Haake-Lewenstein-Wilkens approach (1)
- Heat Transfer (1)
- Hermite polynomial expansion (1)
- Heterogeneous (1)
- Hexagonal grid (1)
- High specific surface area (1)
- Hodge theory (1)
- Hofmeister effect (1)
- Hong-Ou-Mandel effect (1)
- Hooke's law (1)
- Hurricane Harvey (1)
- Hybrid materials (1)
- Hydraulic models (1)
- Hydraulic networks (1)
- Hydrocarbons (1)
- Hydrodynamics (1)
- Hydrogels (1)
- Hydrogen activation (1)
- Hypernetwork (1)
- IACT (1)
- IMD (1)
- IMPTAM (1)
- IN718 (1)
- IR ellipsometry (1)
- IR spectroscopy (1)
- ISM : supernova remnants (1)
- ISM: general (1)
- ISM: individual objects (RX J1713.7-3946, G347.3-0.5) (1)
- ISM: jets and outflows (1)
- ISM: lines and bands (1)
- ISOS-L-1I protocol (1)
- IZO (1)
- Image restoration (1)
- Impurity segregation (1)
- In-situ (1)
- India (1)
- Inelastic neutron scattering (1)
- Inner magnetosphere (1)
- Instrumentation (1)
- Insulators (1)
- Interaction (1)
- Interdisciplinary Physics (1)
- Interface dipole (1)
- Interfaces (1)
- Interfacial strength (1)
- Interferometry (1)
- Interlayer (1)
- Intermittency (1)
- Internal stress (1)
- Interstellar medium (1)
- Intrachain order (1)
- Intragap states (1)
- Ir(111) (1)
- Irradiation (1)
- Junction model (1)
- Kalman filtering (1)
- Kelvin probe (1)
- Khalerchinskaya tundra (1)
- Kongsfjord (1)
- Kp index (1)
- LII (1)
- LLG equation (1)
- Laboratory astrophysics (1)
- Lakes (1)
- Land-sea thermal contrast (1)
- Laplace-type operator (1)
- Large deviation statistics (1)
- Laser powder bed fusion (1)
- Lattice dynamics (1)
- Lehrerbildung (1)
- Levy flight (1)
- Ligand-field state (1)
- Ligands (1)
- Localization regime (1)
- Localized chaos (1)
- Low carbon steel (1)
- Lysozyme (1)
- Längsschnittstudie (1)
- Lévy flights (1)
- Lévy walks (1)
- MATROSHKA-R (1)
- MO (1)
- Machine learning control (1)
- Magellanic Cloud (1)
- Magnetic field (1)
- Magnetic fields (1)
- Magnetic insulators (1)
- Magnetic interactions (1)
- Magnetic stray field (1)
- Magneto-optical effect (1)
- Magnetooptical effects (1)
- Markov additive processes (1)
- Mars (1)
- Maximum entropy method (1)
- Maximum likelihood estimation (1)
- Melt infiltration (1)
- Memory effects (1)
- Metal matrix composite (1)
- Metal oxides (1)
- Metals (1)
- Microcracked ceramics (1)
- Micromechanical modeling (1)
- Micromechanical schemes (1)
- Microscopic morphology (1)
- Microstructure (1)
- Microstructure and (1)
- Microstructure and texture (1)
- Mid-temperature transition (1)
- Mittag-Leffler function (1)
- Mittag-Leffler functions (1)
- MoS2 (1)
- Mobility imbalance (1)
- Mobility relaxation (1)
- Mode function (1)
- Model structural error (1)
- Molar water content (1)
- Molecular structure (1)
- Molecularly imprinted polymer (1)
- Monomers (1)
- Monte Carlo (1)
- Monte Carlo simulation (1)
- Moonlight (1)
- Motivation (1)
- Multi-dimensional Markovian embedding of non-Markovian dynamics (1)
- Multiphase composites (1)
- Multiple trapping model (1)
- NEXAFS (1)
- NLP (1)
- NTCM (1)
- NTF (1)
- Nanoparticles (1)
- Nanoreactor (1)
- Nanoscale heat transfer (1)
- Near-Field Optics (1)
- Negative (1)
- Network inference (1)
- Networks (1)
- Neumann problem (1)
- Neurooscillators (1)
- Ni (1)
- Nickel-based (1)
- Nickel-based superalloy (1)
- Node degree distribution (1)
- Noise floor (1)
- Non-Markovian processes (1)
- Non-linear dielectric spectroscopy (1)
- Non-perturbative analysis (1)
- Nonlinear Dynamics (1)
- Nonlinear analysis (1)
- Nonlinearity (1)
- Nonradiative recombination (1)
- Nuclear magnetic resonance spectroscopy (1)
- Ny-Alesund (1)
- OFET (1)
- OSSS inequality (1)
- Observing methods (1)
- Oligomers (1)
- Open-circuit voltage (1)
- Optical resonators (1)
- Optoelectronic devices and components (1)
- Optoelectronic properties (1)
- Organic LEDs (1)
- Organic electronics (1)
- Organic thermoelectrics (1)
- Organic-inorganic hybrid (1)
- Ornstein–Uhlenbeck process (1)
- Ott - Antonsen reduction (1)
- Ott-Antonsen equation (1)
- Ott-Antonsen reduction (1)
- Oxygen (1)
- P(VDF-TrFE-CFE) (1)
- P3HT (1)
- PBLG (1)
- PEDOT (1)
- PEDOT:PSS (1)
- PNIPAm (1)
- Paleoclimate modeling (1)
- Parametric drift estimation (1)
- Pareto law (1)
- Partial synchrony (1)
- Partial wavelet coherence (1)
- Partially alternating copolymers (1)
- Performanztest (1)
- Periodic solutions (1)
- Perovskite solar cell (1)
- Perovskite solar cells (1)
- Phase dynamics (1)
- Phase modulation (1)
- Phase reconstruction (1)
- Phase transitions (1)
- Phonon dispersion (1)
- Phonon-softening (1)
- Photo-CELIV (1)
- Photoconductivity (1)
- Photocurrent (1)
- Photoexcitations (1)
- Photon density wave spectroscopy (1)
- Photonic devices (1)
- Photothermal conversion (1)
- Photovoltaic gap (1)
- Physik (1)
- Picosecond ultrasonics (1)
- Pipe networks (1)
- Plasma Physics (1)
- Plasmonics (1)
- Plastibodies (1)
- Polarization (1)
- Polaron (1)
- Polycrystals (1)
- Polyetlioxysiloxane (1)
- Polymer intermixing (1)
- Probabilistic projections (1)
- Probability (1)
- Process analytical technology (1)
- Professionswissen (1)
- Prominences (1)
- Prominences, magnetic field (1)
- Prominences, quiescent (1)
- Proteins (1)
- Pseudo-Voigt fit function (1)
- Pulse induced transparency (1)
- PyTorch (1)
- Python (1)
- Quantum optics (1)
- Quartz (1)
- Quasimodes (1)
- Quiescent (1)
- Quiet (1)
- RF gun (1)
- RIXS (1)
- RIXS at FELs (1)
- Radiation dose calculation (1)
- Radiation on the ISS (1)
- Radiation protection (1)
- Raman imaging (1)
- Random cluster model (1)
- Random feature maps (1)
- Randomised tree algorithm (1)
- Rashba effect (1)
- Reaction mechanisms (1)
- Reactive adsorption (1)
- Reactive coupling (1)
- Recombination losses (1)
- Recurrence plots (1)
- Recurrence quantification analysis (1)
- Reflective writing (1)
- Reflexion (1)
- Reflexionsmodell (1)
- Reflexionsqualität (1)
- Reflexionstiefe (1)
- Relaxor-ferroelectric (RF) fluoropolymers (1)
- Relaxor-ferroelectric polymer (1)
- Residual stresses (1)
- Residue (1)
- Resolved and unresolved sources as a function of wavelength (1)
- Resonant inelastic X-ray scattering (1)
- Robin boundary condition (1)
- Rock (1)
- Rocks (1)
- RsgA (1)
- SCAPS-1D (1)
- SEM (1)
- SHPB (1)
- SIO₂ (1)
- SIR model (1)
- SLM (1)
- STM (1)
- Saddle Point (1)
- Saturn (1)
- Scaling exponents (1)
- Scan strategies (1)
- Scanning transmission electron microscopy (1)
- Scattering (1)
- Scattering breakdown (1)
- Schottky junction (1)
- Schrödinger equation (1)
- Science education (1)
- Seebeck coefficient (1)
- Seismicity modelling (1)
- Semantics (1)
- Shannon entropy (1)
- Shnol theorem (1)
- Shockley-Queisser model (1)
- Shockley-Read-Hall (1)
- Shocks (1)
- Si network disintegration (1)
- Signal processing (1)
- Silica source (1)
- Silicification (1)
- Silicon (1)
- Sinai diffusion (1)
- Skalarprodukt von Kraft und Weg (1)
- Small (1)
- Societal impacts (1)
- Solar (1)
- Solar Cycle, observations (1)
- Solar active region magnetic fields (1)
- Solar cycle (1)
- Solar energy (1)
- Solar energy and photovoltaic technology (1)
- Solar filament eruptions (1)
- Solar filaments (1)
- Solvents (1)
- South-America (1)
- Space plasmas (1)
- Space radiation (1)
- Spectral diffusion (1)
- Spectral gap (1)
- Spectroscopy (1)
- Spin-echo (1)
- Stability (1)
- Stars: individual: 4U2206+54, BD+53 2790 (1)
- Statistical copolymers (1)
- Statistical inference (1)
- Steppest Descend method (1)
- Stern-Gerlach effect (1)
- Stille-type cross-coupling (1)
- Stimulated scattering (1)
- Stimuli-responsive materials (1)
- Stochastic reaction– diffusion (1)
- Strain hardening (1)
- Strain measurement (1)
- Stratosphere (1)
- Stress-strain relations (1)
- Structure-performance relationship (1)
- Structure-property relationships (1)
- Sub-gamma random variable (1)
- Subdiffusion (1)
- Sun (1)
- Sun: Chromosphere (1)
- Sun: corona (1)
- Sun: coronal mass ejections (CMEs) (1)
- Sun: filaments, prominences (1)
- Sun: flares (1)
- Sun: heliosphere (1)
- Sun: magnetic fields (1)
- Sun: photosphere (1)
- Supernova remnants (1)
- Surface properties (1)
- Surface treatment (1)
- Surfactant (1)
- Surfactants (1)
- Svalbard (1)
- Synchronization transition (1)
- TCOs (1)
- TD-DFT (1)
- TRMM (1)
- Teleconnection patterns (1)
- Tensile load (1)
- Tension (1)
- Terrestrial cosmogenic nuclide (1)
- Thermal Radiation (1)
- Thermal conductivity (1)
- Thermo optic effects (1)
- Thermoclectrics (1)
- Thermodynamic efficiency (1)
- Thermodynamic properties (1)
- Thermodynamics (1)
- Thermoelectric material (1)
- Thiouracil (1)
- Time delay (1)
- Time series (1)
- Time-dependent mobility (1)
- Time-of-flight (TOF) (1)
- Topological matter (1)
- Transient photocurrent (1)
- Transition metals (1)
- Transition-metal ion (1)
- Trypanosoma cruzi (1)
- Tunneling (1)
- UV cross-linking (1)
- UV nanoimprint lithography (1)
- UV-VIS Spectroscopy (1)
- Ultra-high vacuum (1)
- Ultrafast X-rays (1)
- Ultrafast photoacoustics (1)
- Ultrafast x-ray (1)
- Ultrafast x-ray diffraction (1)
- Ultraviolet photoelectron spectroscopy (1)
- University physics (1)
- Unterrichtsplanung (1)
- Uracil (1)
- V*V884 Sco (1)
- V-OC loss (1)
- VERB (1)
- VERB code (1)
- VERITAS (1)
- Vacuum fields (1)
- Vacuum-level alignment (1)
- Van Allen Probes (1)
- Vector bundle (1)
- Viscoelasticity (1)
- WAAM (1)
- WKB-expansion (1)
- Washing fastness (1)
- Water Vapor (1)
- Water distribution systems (1)
- Water-assisted crystallization (1)
- Wave Propagation (1)
- Wavelets (1)
- Wealth and income distribution (1)
- Weather regimes (1)
- X-ray absorption (1)
- X-ray absorption spectroscopy (1)
- X-ray and (1)
- X-ray computed (1)
- X-ray emission (1)
- X-ray optics (1)
- X-ray refraction; (1)
- X-ray scattering (1)
- X-ray spectroscopy (1)
- X-ray synchrotron diffraction (1)
- X-rays (1)
- X-rays : stars (1)
- X-rays: individuals: Circinus X-1 (1)
- X-rays: individuals: GRS 1915+105 (1)
- X-rays: individuals: V4641 Sgr (1)
- Yield strength (1)
- Zeolite synthesis (1)
- absorption (1)
- absorption lines (1)
- absorption measurements (1)
- acceleration (1)
- acceptance (1)
- acidic crosslinking (1)
- actin (1)
- actin waves (1)
- active matter (1)
- active noise (1)
- active particles (1)
- activity (1)
- actuators (1)
- adaptation and mitigation (1)
- additive (1)
- additive manufacturing (AM) (1)
- aerosol. photoacoustics (1)
- ageing (1)
- aggregation (1)
- air pollution (1)
- alkyltrimethylammonium bromides (1)
- aluminium alloys (1)
- amphiphilic side chains (1)
- amplitude response (1)
- analysis (1)
- analytical model (1)
- analyzer-based imaging (1)
- anatomical connectivity (1)
- and governance (1)
- and surface diffusion (1)
- anomalous (1)
- anomalous (or non-Fickian) diffusion (1)
- anomalous heat conduction (1)
- antimicrobial peptides (1)
- antireflection (1)
- applications (1)
- approximate methods (1)
- artificial defects (1)
- aspect ratio (1)
- assembly factor (1)
- astronomy (1)
- astroparticle physic (1)
- asymmetric Levy flights (1)
- asymptotic analysis (1)
- asynchronous design (1)
- atmosphere (1)
- atomic force microscopy (AFM) (1)
- attosecond phenomena (1)
- authentication (1)
- authentication protocol (1)
- autocorrelation (1)
- autocorrelation function (1)
- autocorrelations (1)
- autoregressive models (1)
- axial next nearest neighbour Ising chains (1)
- azobenzene (1)
- azobenzene containing polymers (1)
- azobenzene containing surfactants (1)
- azobenzene-containing molecules (1)
- background (1)
- bacteria (1)
- bacterial swimming (1)
- bacterial swimming strategies (1)
- ball mill (1)
- bandgap (1)
- barrier escape (1)
- basis-sets (1)
- battery (1)
- battery-depletion attack (1)
- beam splitter (1)
- bifurcation analysis (1)
- bifurcations (1)
- binaries: eclipsing (1)
- binary neutron stars (1)
- biochemical oscillators (1)
- biohybrid microsystems (1)
- bioindicators (1)
- bioreceptors (1)
- biosensing (1)
- biosphere feedbacks (1)
- bipolar and unipolar charging (1)
- bird migration (1)
- bismuth (1)
- bismuthene (1)
- black carbon (1)
- blade (1)
- block copolymer films (1)
- blue stragglers (1)
- boron-10 (1)
- boundary local time (1)
- breakthrough curves (1)
- brownian motion (1)
- brushes (1)
- bubbles (1)
- built-in potential (1)
- bulk (1)
- bulk heterojunction (1)
- bulk heterojunctions (1)
- bulk-heterojunction solar cells (1)
- cambridge cb4 0wf (1)
- cambs (1)
- cancer diagnosis (1)
- capacitance spectroscopy (1)
- carbene electron deficiency (1)
- carbenes (1)
- carbohydrate derivatives (1)
- carbon suboxide (1)
- carbonaceous materials (1)
- cardiomyopathy (1)
- carrier density (1)
- cascading regime (1)
- cataclysmic variables (1)
- catalysis (1)
- catanionic vesicles (1)
- cell migration (1)
- cell motility (1)
- cell nucleus (1)
- cell polarity (1)
- cell-cell (1)
- cellular signalling (1)
- cesium lead halides (1)
- chains (1)
- channel (1)
- chaos (1)
- characterization (1)
- charge (1)
- charge carrier density (1)
- charge carrier extraction (1)
- charge collection (1)
- charge density (1)
- charge generation yield (1)
- charge injection across hybrid interfaces (1)
- charge recombination yield (1)
- charge repulsion (1)
- charge shielding (1)
- charge storage (1)
- charge transfers (1)
- charge transport layers (1)
- charge-carrier transport (1)
- charge-transfer states (1)
- chemical (1)
- chemical interface damping (1)
- chemical kinetics (1)
- chemical modification (1)
- chemical oxidative polymerization (1)
- chemomechanical coupling (1)
- chimera (1)
- chimera state (1)
- chimera states (1)
- chirality (1)
- chloroplast ribosome (1)
- chorus waves (1)
- chromosphere (1)
- circulation (1)
- circumstellar matter (1)
- classification (1)
- cleaner energy transitions (1)
- climate benefits (1)
- climate change (1)
- clustering (1)
- coarse-grained order parameter (1)
- code (1)
- codifference (1)
- coefficient (1)
- coefficients (1)
- cohomology (1)
- collective dynamics (1)
- colloidal particles (1)
- coloured (1)
- coloured and quantum noise (1)
- coma (1)
- comets (1)
- compacton (1)
- competitive adsorption (1)
- complementarity (1)
- complex (1)
- complex systems (1)
- complexes (1)
- composites (1)
- configuration (1)
- confinement (1)
- conformation (1)
- conformational and hydrodynamic characteristics (1)
- conformational changes (1)
- conjugated ladder polymers (1)
- conjugated polymers (1)
- connectivity (1)
- consequences (1)
- conservation laws (1)
- conservative random walks (1)
- constant boundary concentration (1)
- contact resistance (1)
- continuous distribution model (1)
- continuous symmetries (1)
- continuous time random (1)
- continuous time random walk (1)
- continuous time random walk (CTRW) (1)
- continuum: galaxies (1)
- contraction (1)
- convolutional neural networks (1)
- cooperation (1)
- cooperative adsorption (1)
- coordinate measurement machine (1)
- copper iodide (1)
- copper minerals (1)
- corona charging (1)
- correlated noise (1)
- correlation functions (1)
- correlations (1)
- cortical network (1)
- costs (1)
- coupled initial boundary value problem (1)
- coupling (1)
- coupling function (1)
- covalent materials (1)
- covariance (1)
- craters (1)
- critical adsorption (1)
- critical avalanche dynamics (1)
- critical phenomena (1)
- cross layer chip (1)
- crossover anomalous diffusion dynamics (1)
- crossover dynamics (1)
- cryolithology (1)
- crystal (1)
- crystal growth (1)
- crystal orientation (1)
- crystalline (1)
- cyclic voltammetry (1)
- cylindrical geometry (1)
- damage (1)
- dark matter (1)
- dark matter detectors (1)
- dark matter experiments (1)
- dark matter theory (1)
- data assimilation (1)
- data based NARMAX modeling (1)
- data behind figure (1)
- data cleansing (1)
- data profiling (1)
- databases (1)
- de Rham complex (1)
- decomposing anomalous diffusion (1)
- decomposition (1)
- deep learning (1)
- defect detection (1)
- defects (1)
- degree distribution entropy; (1)
- delay differential equation (1)
- delay faults (1)
- delayed feedback (1)
- denial-of-service attack (1)
- density functional calculations (1)
- density functional theory (1)
- dependent velocity (1)
- dermis (1)
- design for Testability (1)
- detector (1)
- diamagnetic currents (1)
- dichalcogenides (1)
- dielectric (1)
- dielectric barrier discharges (1)
- dielectric hysteresis (1)
- dielectrics (1)
- differential scanning calorimetry (1)
- diffraction (1)
- diffraction enhanced imaging (1)
- diffraction-elastic constants (1)
- diffuse radiation (1)
- diffusion coefficients (1)
- diffusion exponent (1)
- diffusion-controlled reactions (1)
- diffusion-influenced (1)
- diffusion-wave equation (1)
- dimension independent bound (1)
- dimensional reduction (1)
- direction of optomechanical stress (1)
- director configuration (1)
- diselenide (1)
- dislocations (1)
- dispatchable renewable electricity (1)
- dispersion (1)
- dispersion force (1)
- doctor-blade coating (1)
- domain purity (1)
- domino effect (1)
- donor (1)
- donor-acceptor interfaces (1)
- doping (1)
- double-multilayer monochromators (1)
- doubly transient chaos (1)
- driven (1)
- driving force (1)
- droughts (1)
- dynamic light scattering (1)
- dynamic loading (1)
- dynamical cluster (1)
- dynamical systems (1)
- dynamics simulation (1)
- ePTFE ferroelectret (1)
- early warning indicators (1)
- ecological (1)
- ecology and biodiversity (1)
- econophysics (1)
- ecosystems (1)
- efficiency (1)
- ejecta (1)
- electret polymers (1)
- electrets (1)
- electrical breakdown (1)
- electrical polarization hysteresis (1)
- electro-electrets (1)
- electro-fused zirconia (1)
- electro-modulation microscopy (1)
- electroanalysis (1)
- electrochemistry (1)
- electrokinetic phenomena (1)
- electromagnetic ion cyclotron waves (1)
- electromagnetic radiation (1)
- electron flux (1)
- electron flux forecasts (1)
- electron lifetimes (1)
- electron localization (1)
- electron microscopy (1)
- electron spectroscopy (1)
- electron-transfer (1)
- electrostatic (1)
- electrostatic interaction (1)
- electrostatics (1)
- elevated-temperature effects on the operation of dielectric-elastomer (1)
- ellipsometry (1)
- elongation (1)
- emic waves (1)
- emission factor (1)
- empirical modeling (1)
- empirical prediction (1)
- enacted PCK (1)
- energetic disorder (1)
- energetic disorders (1)
- energetic offset (1)
- energetic particle (1)
- energy (1)
- energy decarbonization (1)
- energy gradients (1)
- energy system modeling (1)
- energy-level alignments (1)
- england (1)
- ensemble and time averaged mean squared displacement (1)
- ensemble methods (1)
- entrance test (1)
- entropy production (1)
- epidermis (1)
- equation (1)
- equation approach (1)
- equation of state (1)
- equation of state; (1)
- equatorial ionization anomaly (1)
- equatorial ionosphere (1)
- equatorial plasma bubbles (1)
- equatorial plasma depletions (1)
- ergodicity (1)
- exact results (1)
- excited-state proton-transfer (1)
- exciton dynamics (1)
- exciton plasmon coupling (1)
- excitonic materials (1)
- exclusion process (1)
- exclusion processes (1)
- expanding medium (1)
- expectation maximisation algorithm (1)
- experiments (1)
- exploit (1)
- external generation efficiency (1)
- external quantum efficiency (1)
- extremal values (1)
- extreme statistics (1)
- extreme weather impacts (1)
- extrusion (1)
- fastest first-passage time of N walkers (1)
- femtosecond laser spectroscopy (1)
- ferro- and piezoelectrets (1)
- ferroelectric semiconductors (1)
- ferroelectricity and piezoelectricity in polymers (1)
- fiber-electrophoresis chip (1)
- field experience (1)
- field-effect transistor (1)
- figure of merit (1)
- fill factor (1)
- fill factor losses (1)
- film sensor (1)
- films (1)
- filter (1)
- financial time series (1)
- fine granular areas (1)
- finite-size effects (1)
- first-arrival density (1)
- first-passage time distribution (1)
- first-passage times (1)
- first-reaction time (1)
- flagellum (1)
- flares (1)
- flashover (1)
- flexible (1)
- flow network (1)
- fluorescence (1)
- fluorinated organic spacer (1)
- fluorination (1)
- fluoroethylenepropylene (FEP) copolymer (1)
- force methods (1)
- forcing from below (1)
- forecast (1)
- formal specification (1)
- formal verification (1)
- formation (1)
- fractal (1)
- fractal dimension (1)
- fractional brownian motion (1)
- fractional diffusion (1)
- fractional dynamic equations (1)
- fractional dynamics (1)
- fracture surfaces (1)
- free-electron laser (1)
- frequency analysis (1)
- friction (1)
- fullerenes (1)
- functional connectivity (1)
- functional materials (1)
- functionalization (1)
- fungus (1)
- galaxies: clusters: general (1)
- galaxies: elliptical and lenticular, cD (1)
- galaxies: individual (1)
- galaxies: individual: NGC 4038, NGC 4039 (1)
- galaxies: individual: Small Magellanic Cloud (1)
- galaxies: star clusters (1)
- galaxy evolution (1)
- gamma ray detectors (1)
- gamma rays: (1)
- gamma rays: diffuse (1)
- gamma rays: diffuse background (1)
- gamma-ray burst: individual (GRB 150323A) (1)
- gamma-ray bursts: general (1)
- gamma-rays: general (1)
- gas (1)
- gas chromatography (1)
- gene regulatory networks (1)
- general relativity (1)
- generalised langevin equation (1)
- generalized diffusion equation (1)
- generalized eigenfunction (1)
- generalized eigenfunctions (1)
- generational comparison (1)
- genetic networks (1)
- geomagnetic activity (1)
- geomagnetic observatory data (1)
- geomagnetic storm drivers (1)
- geomagnetic storms (1)
- geometrical deformations (1)
- geostationary orbit (1)
- glass (1)
- glassy systems (1)
- global surface warming (1)
- globular clusters: individual: NGC 2808 (1)
- globular clusters: individual: NGC 3201 (1)
- gold cluster (1)
- gold nanoflowers (1)
- gradient boosting (1)
- gradients (1)
- grafted polymers (1)
- granite (1)
- gravitation (1)
- gravitational lensing: strong (1)
- gravitational-wave astronomy (1)
- gravity (1)
- green solvents (1)
- greenhouse gas (1)
- ground state (1)
- group-subgroup relationships (1)
- guided self assembly (1)
- gyroid lattice (1)
- healing (1)
- heart failure (1)
- heat transfer (1)
- helium-3 alternative (1)
- heteroatoms (1)
- heterogeneous diffusion (1)
- heterogeneous diffusion process (1)
- heterogeneous ensemble of Brownian particles (1)
- heterogeneous media (1)
- heterojunction silicon solar cells (1)
- heterostructures (1)
- high dimensional (1)
- high impact polystyrene (1)
- high-frequency force (1)
- high-redshift (1)
- higher-order impacts (1)
- historical geomagnetic storms (1)
- history and philosophy of astronomy (1)
- hole (1)
- hole extraction (1)
- hole selective materials (1)
- hopping dynamics (1)
- human behaviour (1)
- humidity (1)
- hybrid manufacturing (1)
- hybrid material (1)
- hybrid metal oxides (1)
- hybrid nanoparticles (1)
- hybrid synthesis (1)
- hydration layer (1)
- hydrochemistry (1)
- hydrodynamic model (1)
- hydrogels (1)
- hydrogen bonds (1)
- hyperbolic attractor (1)
- ice harboring (1)
- image registration (1)
- imaging (1)
- impedance spectroscopy (1)
- implantable medical device (1)
- implants (1)
- imprinted electrodes (1)
- in situ (1)
- in situ monitoring (1)
- incoherent light (1)
- incoherent radiation (1)
- individual (1)
- individual: CU Vir (1)
- inference (1)
- influence of weak magnetic fields on living systems (1)
- information (1)
- information theory (1)
- infrared: galaxies (1)
- infrared: general (1)
- infrared: planetary systems (1)
- infrared: stars (1)
- inorganic perovskites (1)
- instability (1)
- instructional (1)
- instructional explanation (1)
- instrumentation (1)
- instrumentation: adaptive optics (1)
- interactions (1)
- interface engineering (1)
- interfaces (1)
- intermittency (1)
- intermolecular force (1)
- intersystem crossing (1)
- inversion (1)
- ion beam (1)
- ion boost (1)
- ion channels (1)
- ion mobility spectrometry (1)
- ion optics (1)
- ionic crosslinking (1)
- ionosphere (1)
- iron cyanides (1)
- irreversible volume-change (1)
- irreversible work share (1)
- jets (1)
- jump detection (1)
- kinetic of cis-trans isomerization (1)
- laboratory x-ray diffraction (1)
- land use (1)
- large area devices (1)
- large deviation function (1)
- large-deviation statistic (1)
- large-scale structure of Universe (1)
- laser powder bed fusion (L-PBF) (1)
- laser powder bed fusion (LPBF) AlSi10Mg alloy (1)
- laser pulses (1)
- laser-based additive manufacturing (1)
- lattice gas (1)
- layer-by-layer deposition (1)
- lead halide perovskite films (1)
- leakage scheme (1)
- lesson planning (1)
- light emission (1)
- light management (1)
- light photocontrol (1)
- linear stability analysis (1)
- linearized gravity (1)
- lipid bilayer membrane dynamics (1)
- living cells (1)
- local equilibrium (1)
- localisation (1)
- localization microscopy (1)
- longitudinal study (1)
- loss mechanisms (1)
- low (1)
- low donor content (1)
- low-frequency force (1)
- lunar exploration (1)
- machine learning (1)
- magnetic map (1)
- magnetic microstructures (1)
- magnetic nanoparticles (1)
- magnetic pressure (1)
- magnetic proximity effect (1)
- magnetic pulse (1)
- magnetic stray field (1)
- magnetic-particlebased sensor (1)
- magnetisation (1)
- magnetoreception (1)
- magnetostriction (1)
- manipulation (1)
- manufacturing (AM) (1)
- mass (1)
- master (1)
- material (1)
- material coordinate (1)
- matrix composites (1)
- maximum and range (1)
- maximum entropy analysis (1)
- mean residence time (1)
- mean squared displacement (1)
- mean versus most probable reaction times (1)
- mean-field model (1)
- mechanisms (1)
- melt-quench-anneal (1)
- membrane (1)
- membrane channel (1)
- memory and delay (1)
- memory kernel (1)
- mesoporous silicon (1)
- metal (1)
- metal halide perovskites (1)
- metal optics (1)
- metal species (1)
- methane localization (1)
- methods (1)
- methods: Data analysis (1)
- methods: MHD (1)
- methods: Observational (1)
- methods: statistical (1)
- micro computed tomography (XCT) (1)
- microcracking (1)
- microfluidic paper analytic device (mu PAD) (1)
- microscopy (1)
- microstructure-property relations (1)
- microtransport and -assembly (1)
- mid-temperature transition(s) (1)
- milton rd (1)
- minerals (1)
- miscellaneous (1)
- mixed adsorption layer (1)
- mixed boundary conditions (1)
- mixed domains (1)
- mobile ions (1)
- mobile-immobile model (1)
- mobility (1)
- modeling (1)
- modelling (1)
- models (1)
- modified electrode (1)
- modular logic programs (1)
- mold (1)
- molecular bottle brushes (1)
- molecular brushes (1)
- molecular conformation (1)
- molecular crystals (1)
- molecular hydrodynamics and (1)
- molecular modeling (1)
- molecular overcrowding (1)
- molecular weight (1)
- molecules (1)
- monitoring (1)
- monolayer (1)
- monsoon (1)
- monte-carlo (1)
- motion registration (1)
- movement data (1)
- multi-messenger astrophysics (1)
- multichannel (1)
- multidimensional fractional diffusion equation (1)
- multiple (1)
- mutual information of networks (1)
- myosin II (1)
- nanocomposite (1)
- nanofiber (1)
- nanoscale energy transports (1)
- nanoscale heat transfer (1)
- nanoscale modeling (1)
- narrow escape problem (1)
- natriuretic peptide system (1)
- natural disasters (1)
- natural resources (biological and non-biological) (1)
- navigation (1)
- near-ambient pressure X-ray photoelectron spectroscopy (1)
- near-ambient pressure x-ray photoelectron spectroscopy (1)
- nebulae: general (1)
- negative photochromism (1)
- negative thermal expansion (1)
- nematic liquid crystal (1)
- network (1)
- network dynamics (1)
- network robustness (1)
- neural (1)
- neuronal networks (1)
- neutron powder diffraction (1)
- neutron reflectometry (1)
- neutron resonance spin-echo spectroscopy (1)
- neutron spin-echo (1)
- neutrophils (1)
- nitride materials (1)
- nitrogen (1)
- non-Gaussian (1)
- non-Gaussian diffusion (1)
- non-Gaussian distribution (1)
- non-Gaussian probability (1)
- non-Gaussianity (1)
- non-Langevin reduction factors (1)
- non-contact heat transfer (1)
- non-destructive evaluation (1)
- non-equilibrium (1)
- non-equilibrium steady state (1)
- non-exponential relaxation (1)
- non-exponential statistics (1)
- non-extensive statistics (1)
- non-integer dimension (1)
- non-radiative recombination (1)
- non-repudiation (1)
- nonequilibrium physics (1)
- nonequilibrium stationary state (1)
- nonlinear (1)
- nonlinear clock (1)
- nonlinear frequency conversion (1)
- nonlinear lattice (1)
- nonlocal coupled oscillators (1)
- nonlocal coupling (1)
- nonradiative voltage losses (1)
- nonstationary diffusivity (1)
- novae (1)
- nucleobase (1)
- nucleobases (1)
- nucleus-independent chemical shifts (NICS) (1)
- numerical simulations (1)
- ocean heat uptake (1)
- on-farm evaluation (1)
- onshore wind (1)
- opacity (1)
- open quantum systems (1)
- open-circuit voltage (1)
- optical irradiation intensity (1)
- optical manipulation (1)
- optical simulations (1)
- optical spectroscopy (1)
- optical tomography (1)
- option pricing (1)
- optoplasmonic (1)
- organic (1)
- organic field-effect transistors (1)
- organic interfaces (1)
- organic semiconductors; (1)
- organic solar cell (1)
- organohalide lead perovskites (1)
- orientation approaches (1)
- origins (1)
- osmotic flow (1)
- osmotic-pressure (1)
- overdamped brownian systems (1)
- oxidation state (1)
- oxygen (1)
- oxygen plasma (1)
- p-type (1)
- parameter (1)
- parameter inference (1)
- part I (1)
- particle morphology (1)
- passivation (1)
- patterning glass microfiber (1)
- patterns (1)
- peptides (1)
- percolation (1)
- percolation threshold (1)
- performance assessment (1)
- period doubling (1)
- periodically poled material (1)
- perovskite semiconductors (1)
- perovskite solar cell (1)
- perovskites (1)
- persistence (1)
- perturbation approach (1)
- phase approximation (1)
- phase behavior (1)
- phase diffusion (1)
- phase field model (1)
- phase oscillators (1)
- phase purity (1)
- phase reduction (1)
- phase response (1)
- phase response curve (1)
- phase transitions (1)
- phase-isostable reduction (1)
- phase-transition boundary (1)
- phospholipid membranes (1)
- photocatalysts (1)
- photocontrol (1)
- photodissociation region (PDR) (1)
- photoelectron (1)
- photoexcited hole transfer (1)
- photofragmentation (1)
- photoisomerization (1)
- photoluminescence quenching (1)
- photon recycling (1)
- photon statistics (1)
- photonic crystal fibers (1)
- photosensitive polymers (1)
- photosensitive surfactants (1)
- photostability (1)
- photovoltaic devices (1)
- physical chemistry (1)
- physical hydrogels (1)
- physics education (1)
- picosecond ultrasonics (1)
- piezoelectret (1)
- piezoelectrets (1)
- piezoelectric response (1)
- pink beams (1)
- pitch angle (1)
- pitch angle scattering (1)
- planetary (1)
- planetary nebulae: individual: SwSt1 (1)
- planets and satellites: dynamical evolution and stability (1)
- planets and satellites: individual (Saturn) (1)
- planning constraints (1)
- plasma flows (1)
- plasma pressure (1)
- plasmaspheric hiss (1)
- plasmaspheric plume (1)
- plasmonic chemistry (1)
- plasmonics (1)
- polarization (1)
- policies (1)
- politics (1)
- poly(gamma-benzyl L-glutamate) (1)
- poly(vinylidenefluoride-trifluoroethylene) P(VDF-TrFE) (1)
- polyelectrolyte adsorption (1)
- polyelectrolytes (1)
- polymer (1)
- polymer dynamics (1)
- polymer ferroelectrets (1)
- polymer reconfiguration (1)
- polymer-foam films (1)
- polymerase chain reaction (PCR) (1)
- polypropylene (1)
- polypyrrole (1)
- polysulfobetaines (1)
- polytetrafluoroethylene (PTFE) (1)
- polyurethanes (1)
- polyzwitterions (1)
- populations (1)
- pore orientation (1)
- porosity (1)
- porous carbon materials (1)
- porphyrin (1)
- positioning (1)
- positive solutions (1)
- posttranslational protein translocation (1)
- potential ene rgy surface (1)
- power conversion efficiency (1)
- power spectral density (1)
- power spectrum (1)
- pp-wave solutions (1)
- practicum (1)
- pre-service teachers (1)
- precipitation (1)
- prediction (1)
- preferred orientation (1)
- preparedness (1)
- pressure-volume change (1)
- pressures (1)
- printed electroacoustic thin-film transducers (1)
- printing (1)
- probabilistic inference (1)
- probability density function (1)
- process (1)
- process atmosphere (1)
- process inference (1)
- process monitoring (1)
- projections (1)
- proteasome (1)
- protein folding (1)
- protein search (1)
- protein translocation (1)
- proteins (1)
- protocols (1)
- pulsars: individual: PSR B0656+14 (1)
- pulsars: individual: PSR B0833-45 (1)
- pulsars: individual: SXP 1062 (1)
- pulse compression (1)
- pulse front matching (1)
- pump-probe (1)
- purification (1)
- quality (1)
- quantum (1)
- quantum correlations (1)
- quantum gravity (1)
- quantum mechanics (1)
- quartz crystal microbalance (1)
- quasar: absorption line (1)
- quasars: (1)
- quasars: emission lines (1)
- quasars: individual: 3C 279 (1)
- quasars: individual: LBQS 0302-0018 (1)
- quasi-Fermi level (1)
- quasi-particles (1)
- quasi-steady-state photoinduced absorptions (1)
- radiation belt (1)
- radiation belt electrons (1)
- radiation belt forecasts (1)
- radiation pressure (1)
- radiative limit (1)
- radiative transfer (1)
- radio (1)
- radio continuum: stars (1)
- rainy-season (1)
- random forest (1)
- random search processes (1)
- random walk (1)
- random-walk (1)
- random-walks (1)
- rare events (1)
- ratchets (1)
- reaction cascade (1)
- reaction-diffusion models (1)
- reactions (1)
- readout electronics (1)
- reanalysis (1)
- recombination losses (1)
- recombination order (1)
- recombinations (1)
- rectification (1)
- recurrence analysis (1)
- recurrence plot (1)
- reflected Brownian motion (1)
- reflecting boundary conditions (1)
- regional equity (1)
- regression (1)
- relationships (1)
- relative total electron content (1)
- relativistic electron precipitation (1)
- relaxor-ferroelectric polymer (1)
- relaxor-ferroelectric polymers (1)
- remaining degree entropy (1)
- remote monitoring (1)
- repertory grid (1)
- research priorities (1)
- resetting (1)
- residual stress analysis (1)
- resolution matrix (1)
- resonant X-ray scattering (1)
- resonant inelastic X-ray scattering (1)
- resource assessments (1)
- reversible binding (1)
- reversible work share (1)
- reversible-share-theorem (1)
- ribosome assembly (1)
- right limits (1)
- ring (1)
- ring current (1)
- ring current electrons (1)
- ring current model (1)
- rock (1)
- rotation curves of galaxies (1)
- rotational diffusion (1)
- royal soc chemistry (1)
- run and tumble (1)
- rutile-type (1)
- scalability (1)
- scalar product of force and displacement (1)
- scaled Brownian motion (1)
- scanning tunneling microscopy (1)
- scanning tunneling spectroscopy (1)
- school internship (1)
- science park (1)
- screen (1)
- search dynamics (1)
- search efficiency (1)
- segmentations (1)
- selective contact (1)
- selective laser melting (1)
- self-organisation (1)
- self-sufficiency (1)
- self-sustained oscillations (1)
- sensors and actuators (1)
- seperation (1)
- sequence-controlled polymers (1)
- shell-like geometries (1)
- shifts (1)
- silicon (1)
- silver (1)
- single chain folding (1)
- single trajectories (1)
- single trajectory analysis (1)
- single-molecule (1)
- single-particle tracking (1)
- single-stranded-dna (1)
- single-trajectory analysis (1)
- sintering (1)
- skutterudite (1)
- small molecules (1)
- smart card (1)
- social acceptance (1)
- sodium dodecyl sulfate (1)
- soft X-ray (1)
- soft X-ray absorption (1)
- soft X-ray beamline (1)
- soft X-ray spectroscopy (1)
- soft electro-active materials (1)
- soft matter (1)
- soil moisture (1)
- solar coronal mass ejections (1)
- solar storm (1)
- solid-state nanopores (1)
- solitary wave (1)
- soliton (1)
- solvation (1)
- solvent vapor annealing (1)
- space charge (1)
- space-charge effects (1)
- space-charge stability (1)
- space-dependent diffusivity (1)
- space-time fractional diffusion equation (1)
- spacing (1)
- spark plasma (1)
- spatial (1)
- spatial poisson distribution (1)
- spatters (1)
- specific ion effects (1)
- spectra (1)
- spectrometry (1)
- spectroscopic (1)
- spectroscopy (1)
- spin (1)
- spin foam models (1)
- spin glass (1)
- spin state (1)
- spin- and angle-resolved photoemission (1)
- spin-crossover (1)
- spin-dependent forces (1)
- spin-orbit coupling (1)
- spin-orbit interaction (1)
- spin-related factors (1)
- spin-resolved (1)
- spiro-OMeTAD (1)
- spiropyran/merocyanine isomerization (1)
- split Hopkinson pressure bar (1)
- splitting (1)
- spontaneous parametric down-conversion (1)
- spread F (1)
- sputtering (1)
- stability analysis (1)
- stability and accuracy (1)
- stable water isotopes (1)
- stars (1)
- stars : Wolf-Rayet (1)
- stars : atmospheres (1)
- stars : early-type (1)
- stars : evolution (1)
- stars : individual : xi Per (1)
- stars : individual : zeta Oph (1)
- stars : individual : zeta Ori (1)
- stars : individual : zeta Pup (1)
- stars : mass-loss (1)
- stars : winds, outflows (1)
- stars evolution (1)
- stars: Wolft-Rayet (1)
- stars: circumstellar matter (1)
- stars: early-typeP (1)
- stars: flare (1)
- stars: formation (1)
- stars: horizontal branch (1)
- stars: horizontal-branch (1)
- stars: individual (PHL 457, EQ Psc) (1)
- stars: individual: 4U1700-37 (1)
- stars: individual: DGCVn-gamma rays: stars (1)
- stars: individual: HD 137366 (1)
- stars: individual: HD 93129A (1)
- stars: individual: HR 5907 (1)
- stars: individual: PG 1610+062 (1)
- stars: individual: R 145 (1)
- stars: individual: SMC AB 6 (1)
- stars: individual: WR 7 (1)
- stars: late-type (1)
- stars: magnetars (1)
- stars: oscillations (1)
- stars: oscillations (including pulsations) (1)
- stars: variables: general (1)
- state space modelling (1)
- stationary stochastic process (1)
- statistical physics (1)
- statistically relevant volumes (1)
- statistics (1)
- stators (1)
- stellar content (1)
- stellar coronal mass ejections (1)
- stimuli-responsive structured polymer films (1)
- stochastic dynamics (1)
- stochastic models (1)
- stochastic process (1)
- stochastic resonance (1)
- stochastic thermodynamics (1)
- stochastic time series (1)
- stochastics (1)
- strain-free lattice (1)
- stress exponent (1)
- stress recovery (1)
- stress-relaxation (1)
- stroboscopic imaging (1)
- strong coupling (1)
- structure (1)
- structure of water (1)
- structure-property (1)
- structured environments (1)
- structured polynucleotides (1)
- structures (1)
- stuck-at faults (1)
- subgrain structure (1)
- summer (1)
- sunspots (1)
- superalloys (1)
- superdiffusion and (1)
- superluminescent diodes (1)
- supernovae: general (1)
- supervised machine learning (1)
- supply chains (1)
- support vector machines (1)
- surface band bending (1)
- surface charge (1)
- surface cracks (1)
- surface modification (1)
- surface morphology (1)
- surface photovoltage (1)
- surface reactivity (1)
- surface recombination (1)
- surface reconstruction (1)
- surface science (1)
- surface states (1)
- surface tension (1)
- surface treatment (1)
- surface wetting (1)
- surface-enhanced Raman scattering (1)
- surface-enhanced infrared absorption spectroscopy (1)
- surface-roughened (1)
- surfactant adsorption (1)
- susceptibility (1)
- swelling soil (1)
- synchrotron X-ray refraction (1)
- synchrotron X-ray refraction radiography (1)
- synchrotron X-ray refraction radiography (SXRR) (1)
- synchrotron radiation (1)
- synchrotron x-ray refraction radiography (SXRR) (1)
- synthesis (1)
- system-immanent forces (1)
- systemimmanente Kräfte (1)
- systems subjected to parameter drift (1)
- table-top sources (1)
- tandem solar cells (1)
- tau proteins (1)
- teacher education (1)
- techniques (1)
- techniques: Image processing (1)
- techniques: radial velocities (1)
- telegrapher's equation (1)
- telluride (1)
- tellurium (1)
- temperature (1)
- temperature dependence (1)
- terahertz range (1)
- ternary blends (1)
- texture (1)
- thermal barrier coatings (1)
- thermal conductivity (1)
- thermal energy storage (1)
- thermal stimulation of (1)
- thermally enhanced actuators (1)
- thermally induced porosity (TIP) (1)
- thermally stimulated depolarization current (1)
- thermoactivational spectroscopy (1)
- thermodynamic control (1)
- thermodynamic length (1)
- thermoelectric materials (1)
- thermoelectric properties (1)
- thermoelectrics (1)
- theta neurons (1)
- thickness insensitive active layers (1)
- thin films (1)
- thin-film solar cells (1)
- thiouracil (1)
- thomas graham house (1)
- threshold voltages (1)
- through space NMR shieldings (1)
- tidal effects (1)
- time (1)
- time averaging (1)
- time series analysis (1)
- time-averaged mean squared displacement (1)
- time-fractional Schrödinger equation (1)
- time-resolved (1)
- time-resolved UV-vis measurements (1)
- time-resolved X-ray probing (1)
- time-resolved photoemission (1)
- timing resilient design (1)
- tipping cascade (1)
- tipping elements (1)
- tipping interactions (1)
- titanium dioxide (1)
- tomography (XCT) (1)
- topological community (1)
- total work (1)
- tracking (1)
- trade (1)
- tranfer excited-state (1)
- transfer dynamics (1)
- transient absorption spectroscopy (1)
- transient grating spectroscopy (1)
- transient spectroscopy (1)
- transmission (1)
- transparent conductors (1)
- transport layer (1)
- transport layers (1)
- transports (1)
- transversal instabilities (1)
- traveling waves (1)
- triple-axis spectroscopy (1)
- triple-cation perovskite (1)
- tropical cyclones (1)
- truncated power-law correlated noise (1)
- turbulent wind shear zone (1)
- twisted state (1)
- ultrafast (1)
- ultrafast molecular dynamics (1)
- ultrafast optics (1)
- ultrafast phenomena (1)
- ultrafast photoacoustics (1)
- ultrafast spectroscopy (1)
- ultrafast x-ray diffraction (1)
- ultrarelativistic electrons (1)
- ultraviolet photoelectron spectroscopy (1)
- ultraviolet: galaxies (1)
- ultraviolet: stars (1)
- upconversion nanoparticles (1)
- utility-scale batteries (1)
- vacuum fields (1)
- van allen probes (RBSP) (1)
- van allen probes; (1)
- variable order (1)
- verb (1)
- verb simulations; (1)
- very-high-cycle fatigue (1)
- vibrational resonance (1)
- vibrational spectroscopy (1)
- viscoelastic effects and anomalous diffusion (1)
- viscosity (1)
- walks (1)
- water (1)
- water adsorption (1)
- water diffusion in the brain (1)
- water ice (1)
- water-interface (1)
- water-methane films (1)
- water/hexane vapor interface (1)
- wave particle interaction (1)
- wave structure (1)
- wave-particle interactions (1)
- waveguides (1)
- weak ergodicity breaking (1)
- wearable (1)
- wearable energy harvester (1)
- weather (1)
- weighted (1)
- whispering gallery modes (1)
- wind channelling (1)
- wind direction (1)
- wind field (1)
- wind speed (1)
- windlidar (1)
- wurtzite type (1)
- x-ray free-electron lasers (1)
- x-ray photoemission (1)
- x-ray spectroscopies and phenomena (1)
- x-ray-absorption (1)
- zebrafish (1)
- zero-power defense (1)
- zwitterions (1)
- иперболический аттрактор (1)
- когомологии (1)
- комплекс де Рама (1)
- оллективная динамика (1)
- проблема Неймана (1)
- синхронизация (1)
- теория Ходжа (1)
Institute
- Institut für Physik und Astronomie (925)
- Institut für Chemie (37)
- Institut für Mathematik (15)
- Extern (8)
- Institut für Geowissenschaften (7)
- Institut für Umweltwissenschaften und Geographie (6)
- Institut für Biochemie und Biologie (5)
- Mathematisch-Naturwissenschaftliche Fakultät (5)
- Fachgruppe Politik- & Verwaltungswissenschaft (3)
- Hasso-Plattner-Institut für Digital Engineering gGmbH (3)
Charge carrier recombination in organic disordered semiconductors is strongly influenced by the thermalization of charge carriers in the density of states (DOS). Measurements of recombination dynamics, conducted under transient or steady-state conditions, can easily be misinterpreted when a detailed understanding of the interplay of thermalization and recombination is missing. To enable adequate measurement analysis, we solve the multiple-trapping problem for recombining charge carriers and analyze it in the transient and steady excitation paradigm for different DOS distributions. We show that recombination rates measured after pulsed excitation are inherently time dependent since recombination gradually slows down as carriers relax in the DOS. When measuring the recombination order after pulsed excitation, this leads to an apparent high-order recombination at short times. As times goes on, the recombination order approaches an asymptotic value. For the Gaussian and the exponential DOS distributions, this asymptotic value equals the recombination order of the equilibrated system under steady excitation. For a more general DOS distribution, the recombination order can also depend on the carrier density, under both transient and steady-state conditions. We conclude that transient experiments can provide rich information about recombination in and out of equilibrium and the underlying DOS occupation provided that consistent modeling of the system is performed.
We present an X-ray-optical cross-correlator for the soft (> 150 eV) up to the hard X-ray regime based on a molybdenum-silicon superlattice. The cross-correlation is done by probing intensity and position changes of superlattice Bragg peaks caused by photoexcitation of coherent phonons. This approach is applicable for a wide range of X-ray photon energies as well as for a broad range of excitation wavelengths and requires no external fields or changes of temperature. Moreover, the cross-correlator can be employed on a 10 ps or 100 fs time scale featuring up to 50% total X-ray reflectivity and transient signal changes of more than 20%. (C) 2016 Author(s).
In the scenario of the narrow escape problem (NEP) a particle diffuses in a finite container and eventually leaves it through a small 'escape window' in the otherwise impermeable boundary, once it arrives to this window and crosses an entropic barrier at the entrance to it. This generic problem is mathematically identical to that of a diffusion-mediated reaction with a partially-reactive site on the container's boundary. Considerable knowledge is available on the dependence of the mean first-reaction time (FRT) on the pertinent parameters. We here go a distinct step further and derive the full FRT distribution for the NEP. We demonstrate that typical FRTs may be orders of magnitude shorter than the mean one, thus resulting in a strong defocusing of characteristic temporal scales. We unveil the geometry-control of the typical times, emphasising the role of the initial distance to the target as a decisive parameter. A crucial finding is the further FRT defocusing due to the barrier, necessitating repeated escape or reaction attempts interspersed with bulk excursions. These results add new perspectives and offer a broad comprehension of various features of the by-now classical NEP that are relevant for numerous biological and technological systems.
In nature as well as in the context of infection and medical applications, bacteria often have to move in highly complex environments such as soil or tissues. Previous studies have shown that bacteria strongly interact with their surroundings and are often guided by confinements. Here, we investigate theoretically how the dispersal of swimming bacteria can be augmented by microfluidic environments and validate our theoretical predictions experimentally. We consider a system of bacteria performing the prototypical run-and-tumble motion inside a labyrinth with square lattice geometry. Narrow channels between the square obstacles limit the possibility of bacteria to reorient during tumbling events to an area where channels cross. Thus, by varying the geometry of the lattice it might be possible to control the dispersal of cells. We present a theoretical model quantifying diffusive spreading of a run-and-tumble random walker in a square lattice. Numerical simulations validate our theoretical predictions for the dependence of the diffusion coefficient on the lattice geometry. We show that bacteria moving in square labyrinths exhibit enhanced dispersal as compared to unconfined cells. Importantly, confinement significantly extends the duration of the phase with strongly non-Gaussian diffusion, when the geometry of channels is imprinted in the density profiles of spreading cells. Finally, in good agreement with our theoretical findings, we observe the predicted behaviors in experiments with E. coli bacteria swimming in a square lattice labyrinth created in amicrofluidic device. Altogether, our comprehensive understanding of bacterial dispersal in a simple two-dimensional labyrinth makes the first step toward the analysis of more complex geometries relevant for real world applications.
For both Lévy flight and Lévy walk search processes we analyse the full distribution of first-passage and first-hitting (or first-arrival) times. These are, respectively, the times when the particle moves across a point at some given distance from its initial position for the first time, or when it lands at a given point for the first time. For Lévy motions with their propensity for long relocation events and thus the possibility to jump across a given point in space without actually hitting it ('leapovers'), these two definitions lead to significantly different results. We study the first-passage and first-hitting time distributions as functions of the Lévy stable index, highlighting the different behaviour for the cases when the first absolute moment of the jump length distribution is finite or infinite. In particular we examine the limits of short and long times. Our results will find their application in the mathematical modelling of random search processes as well as computer algorithms.
Many studies on biological and soft matter systems report the joint presence of a linear mean-squared displacement and a non-Gaussian probability density exhibiting, for instance, exponential or stretched-Gaussian tails. This phenomenon is ascribed to the heterogeneity of the medium and is captured by random parameter models such as ‘superstatistics’ or ‘diffusing diffusivity’. Independently, scientists working in the area of time series analysis and statistics have studied a class of discrete-time processes with similar properties, namely, random coefficient autoregressive models. In this work we try to reconcile these two approaches and thus provide a bridge between physical stochastic processes and autoregressive models.Westart from the basic Langevin equation of motion with time-varying damping or diffusion coefficients and establish the link to random coefficient autoregressive processes. By exploring that link we gain access to efficient statistical methods which can help to identify data exhibiting Brownian yet non-Gaussian diffusion.
Fractional Brownian motion (FBM) is a Gaussian stochastic process with stationary, long-time correlated increments and is frequently used to model anomalous diffusion processes. We study numerically FBM confined to a finite interval with reflecting boundary conditions. The probability density function of this reflected FBM at long times converges to a stationary distribution showing distinct deviations from the fully flat distribution of amplitude 1/L in an interval of length L found for reflected normal Brownian motion. While for superdiffusion, corresponding to a mean squared displacement (MSD) 〈X² (t)〉 ⋍ tᵅ with 1 < α < 2, the probability density function is lowered in the centre of the interval and rises towards the boundaries, for subdiffusion (0 < α < 1) this behaviour is reversed and the particle density is depleted close to the boundaries. The MSD in these cases at long times converges to a stationary value, which is, remarkably, monotonically increasing with the anomalous diffusion exponent α. Our a priori surprising results may have interesting consequences for the application of FBM for processes such as molecule or tracer diffusion in the confines of living biological cells or organelles, or other viscoelastic environments such as dense liquids in microfluidic chambers.
Astandard approach to study time-dependent stochastic processes is the power spectral density (PSD), an ensemble-averaged property defined as the Fourier transform of the autocorrelation function of the process in the asymptotic limit of long observation times, T → ∞. In many experimental situations one is able to garner only relatively few stochastic time series of finite T, such that practically neither an ensemble average nor the asymptotic limit T → ∞ can be achieved. To accommodate for a meaningful analysis of such finite-length data we here develop the framework of single-trajectory spectral analysis for one of the standard models of anomalous diffusion, scaled Brownian motion.Wedemonstrate that the frequency dependence of the single-trajectory PSD is exactly the same as for standard Brownian motion, which may lead one to the erroneous conclusion that the observed motion is normal-diffusive. However, a distinctive feature is shown to be provided by the explicit dependence on the measurement time T, and this ageing phenomenon can be used to deduce the anomalous diffusion exponent.Wealso compare our results to the single-trajectory PSD behaviour of another standard anomalous diffusion process, fractional Brownian motion, and work out the commonalities and differences. Our results represent an important step in establishing singletrajectory PSDs as an alternative (or complement) to analyses based on the time-averaged mean squared displacement.
We show that the codifference is a useful tool in studying the ergodicity breaking and non-Gaussianity properties of stochastic time series. While the codifference is a measure of dependence that was previously studied mainly in the context of stable processes, we here extend its range of applicability to random-parameter and diffusing-diffusivity models which are important in contemporary physics, biology and financial engineering. We prove that the codifference detects forms of dependence and ergodicity breaking which are not visible from analysing the covariance and correlation functions. We also discuss a related measure of dispersion, which is a nonlinear analogue of the mean squared displacement.
We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructures. Spatial separation of the Nb detection layer from the laser excitation region allows for a background-free characterization of the laser-generated strain pulses. We clearly observe symmetric bipolar strain pulses if the excited TbFe2 surface terminates the sample and a decomposition of the strain wavepacket into an asymmetric bipolar and a unipolar pulse, if a SiO2 glass capping layer covers the excited TbFe2 layer. The inverse magnetostriction of the temporally separated unipolar strain pulses in this sample leads to a MOKE signal that linearly depends on the strain pulse amplitude measured through UXRD. Linear chain model simulations accurately predict the timing and shape of UXRD and MOKE signals that are caused by the strain reflections from multiple interfaces in the heterostructure.
We measure valence-to-core x-ray emission spectra of compressed crystalline GeO₂ up to 56 GPa and of amorphous GeO₂ up to 100 GPa. In a novel approach, we extract the Ge coordination number and mean Ge-O distances from the emission energy and the intensity of the Kβ'' emission line. The spectra of high-pressure polymorphs are calculated using the Bethe-Salpeter equation. Trends observed in the experimental and calculated spectra are found to match only when utilizing an octahedral model. The results reveal persistent octahedral Ge coordination with increasing distortion, similar to the compaction mechanism in the sequence of octahedrally coordinated crystalline GeO₂ high-pressure polymorphs.
Abstract
The emerging diffusive dynamics in many complex systems show a characteristic crossover behaviour from anomalous to normal diffusion which is otherwise fitted by two independent power-laws. A prominent example for a subdiffusive–diffusive crossover are viscoelastic systems such as lipid bilayer membranes, while superdiffusive–diffusive crossovers occur in systems of actively moving biological cells. We here consider the general dynamics of a stochastic particle driven by so-called tempered fractional Gaussian noise, that is noise with Gaussian amplitude and power-law correlations, which are cut off at some mesoscopic time scale. Concretely we consider such noise with built-in exponential or power-law tempering, driving an overdamped Langevin equation (fractional Brownian motion) and fractional Langevin equation motion. We derive explicit expressions for the mean squared displacement and correlation functions, including different shapes of the crossover behaviour depending on the concrete tempering, and discuss the physical meaning of the tempering. In the case of power-law tempering we also find a crossover behaviour from faster to slower superdiffusion and slower to faster subdiffusion. As a direct application of our model we demonstrate that the obtained dynamics quantitatively describes the subdiffusion–diffusion and subdiffusion–subdiffusion crossover in lipid bilayer systems. We also show that a model of tempered fractional Brownian motion recently proposed by Sabzikar and Meerschaert leads to physically very different behaviour with a seemingly paradoxical ballistic long time scaling.
A considerable number of systems have recently been reported in which
Brownian yet non-Gaussian dynamics was observed. These are processes characterised by a linear growth in time of the mean squared displacement, yet the probability density function of the particle displacement is distinctly non-Gaussian, and often of exponential(Laplace) shape. This apparently ubiquitous behaviour observed in very different physical systems has been interpreted as resulting from diffusion in inhomogeneous environments and mathematically represented through a variable, stochastic diffusion coefficient. Indeed different models describing a fluctuating diffusivity have been studied. Here we present a new view of the stochastic basis describing time dependent random diffusivities within a broad spectrum of distributions. Concretely, our study is based on the very generic class of the generalised Gamma distribution. Two models for the particle spreading in such random diffusivity settings are studied. The first belongs to the class of generalised grey Brownian motion while the second follows from the idea of diffusing diffusivities. The two processes exhibit significant characteristics which reproduce experimental results from different biological and physical systems. We promote these two physical models for the description of stochastic particle motion in complex environments.
Recent advances in single particle tracking and supercomputing techniques demonstrate the emergence of normal or anomalous, viscoelastic diffusion in conjunction with non-Gaussian distributions in soft, biological, and active matter systems. We here formulate a stochastic model based on a generalised Langevin equation in which non-Gaussian shapes of the probability density function and normal or anomalous diffusion have a common origin, namely a random parametrisation of the stochastic force. We perform a detailed analysis demonstrating how various types of parameter distributions for the memory kernel result in exponential, power law, or power-log law tails of the memory functions. The studied system is also shown to exhibit a further unusual property: the velocity has a Gaussian one point probability density but non-Gaussian joint distributions. This behaviour is reflected in the relaxation from a Gaussian to a non-Gaussian distribution observed for the position variable. We show that our theoretical results are in excellent agreement with stochastic simulations.
Fixational eye movements show scaling behaviour of the positional mean-squared displacement with a characteristic transition from persistence to antipersistence for increasing time-lag. These statistical patterns were found to be mainly shaped by microsaccades (fast, small-amplitude movements). However, our re-analysis of fixational eye-movement data provides evidence that the slow component (physiological drift) of the eyes exhibits scaling behaviour of the mean-squared displacement that varies across human participants. These results suggest that drift is a correlated movement that interacts with microsaccades. Moreover, on the long time scale, the mean-squared displacement of the drift shows oscillations, which is also present in the displacement auto-correlation function. This finding lends support to the presence of time-delayed feedback in the control of drift movements. Based on an earlier non-linear delayed feedback model of fixational eye movements, we propose and discuss different versions of a new model that combines a self-avoiding walk with time delay. As a result, we identify a model that reproduces oscillatory correlation functions, the transition from persistence to antipersistence, and microsaccades.
Effects of the target aspect ratio and intrinsic reactivity onto diffusive search in bounded domains
(2017)
Westudy the mean first passage time (MFPT) to a reaction event on a specific site in a cylindrical geometry—characteristic, for instance, for bacterial cells, with a concentric inner cylinder representing the nuclear region of the bacterial cell. Asimilar problem emerges in the description of a diffusive search by a transcription factor protein for a specific binding region on a single strand of DNA.We develop a unified theoretical approach to study the underlying boundary value problem which is based on a self-consistent approximation of the mixed boundary condition. Our approach permits us to derive explicit, novel, closed-form expressions for the MFPT valid for a generic setting with an arbitrary relation between the system parameters.Weanalyse this general result in the asymptotic limits appropriate for the above-mentioned biophysical problems. Our investigation reveals the crucial role of the target aspect ratio and of the intrinsic reactivity of the binding region, which were disregarded in previous studies. Theoretical predictions are confirmed by numerical simulations.
Molecules often fragment after photoionization in the gas phase. Usually, this process can only be investigated spectroscopically as long as there exists electron correlation between the photofragments. Important parameters, like their kinetic energy after separation, cannot be investigated. We are reporting on a femtosecond time-resolved Auger electron spectroscopy study concerning the photofragmentation dynamics of thymine. We observe the appearance of clearly distinguishable signatures from thymine′s neutral photofragment isocyanic acid. Furthermore, we observe a time-dependent shift of its spectrum, which we can attribute to the influence of the charged fragment on the Auger electron. This allows us to map our time-dependent dataset onto the fragmentation coordinate. The time dependence of the shift supports efficient transformation of the excess energy gained from photoionization into kinetic energy of the fragments. Our method is broadly applicable to the investigation of photofragmentation processes.
We consider synchronization properties of arrays of spin-torque nano-oscillators coupled via an RC load. We show that while the fully synchronized state of identical oscillators may be locally stable in some parameter range, this synchrony is not globally attracting. Instead, regimes of different levels of compositional complexity are observed. These include chimera states (a part of the array forms a cluster while other units are desynchronized), clustered chimeras (several clusters plus desynchronized oscillators), cluster state (all oscillators form several clusters), and partial synchronization (no clusters but a nonvanishing mean field). Dynamically, these states are also complex, demonstrating irregular and close to quasiperiodic modulation. Remarkably, when heterogeneity of spin-torque oscillators is taken into account, dynamical complexity even increases: close to the onset of a macroscopic mean field, the dynamics of this field is rather irregular.
Passive coherent combination of several discrete low power laser diodes is a promising way to overcome the issue of degrading beam quality when scaling single emitters to > 10W output power. Such systems would be an efficient alternative to current high power sources, yet they suffer from fatal coherence loss when operated well above threshold. We present a new way to obtain detailed coherence information for laser diode arrays using a spatial light modulator to help identify the underlying decoherence processes. Reconstruction tests of the emitted far-field distribution are conducted to evaluate the performance of our setup.
Anomalous diffusion is being discovered in a fast growing number of systems. The exact nature of this anomalous diffusion provides important information on the physical laws governing the studied system. One of the central properties analysed for finite particle motion time series is the intrinsic variability of the apparent diffusivity, typically quantified by the ergodicity breaking parameter EB. Here we demonstrate that frequently EB is insufficient to provide a meaningful measure for the observed variability of the data. Instead, important additional information is provided by the higher order moments entering by the skewness and kurtosis. We analyse these quantities for three popular anomalous diffusion models. In particular, we find that even for the Gaussian fractional Brownian motion a significant skewness in the results of physical measurements occurs and needs to be taken into account. Interestingly, the kurtosis and skewness may also provide sensitive estimates of the anomalous diffusion exponent underlying the data. We also derive a new result for the EB parameter of fractional Brownian motion valid for the whole range of the anomalous diffusion parameter. Our results are important for the analysis of anomalous diffusion but also provide new insights into the theory of anomalous stochastic processes.