TY  - JOUR
A1  - Kleyer, Michael
A1  - Schröder-Esselbach, Boris
A1  - Biedermann, Robert
A1  - Rudner, Michael
A1  - Fritzsch, K.
A1  - Kühner, A.
A1  - Poschlod, P.
A1  - Kahmen, S.
A1  - Tackenberg, O.
A1  - Talmon, E.
A1  - Poethke, H.-J.
A1  - Obermaier, E.
A1  - Hein, S.
A1  - Hinsch, M.
A1  - Henle, K.
A1  - Settele, Josef
A1  - Binzenhöfer, Birgit
A1  - Pfeifer, A.
A1  - Kögl, H.
T1  - Freie Beweidung mit geringer Besatzdichte und Fräsen als alternative Verfahren zur Pflege von Magerrasen
Y1  - 2004
SN  - 0341-7026
ER  - 
TY  - JOUR
A1  - Hein, M.
A1  - Eisert, Jens
A1  - Briegel, Hans J.
T1  - Multiparty entanglement in graph states
N2  - Graph states are multiparticle entangled states that correspond to mathematical graphs, where the vertices of the graph take the role of quantum spin systems and edges represent Ising interactions. They are many-body spin states of distributed quantum systems that play a significant role in quantum error correction, multiparty quantum communication, and quantum computation within the framework of the one-way quantum computer. We characterize and quantify the genuine multiparticle entanglement of such graph states in terms of the Schmidt measure, to which we provide upper and lower bounds in graph theoretical terms. Several examples and classes of graphs will be discussed, where these bounds coincide. These examples include trees, cluster states of different dimensions, graphs that occur in quantum error correction, such as the concatenated [7,1,3]-CSS code, and a graph associated with the quantum Fourier transform in the one-way computer. We also present general transformation rules for graphs when local Pauli measurements are applied, and give criteria for the equivalence of two graphs up to local unitary transformations, employing the stabilizer formalism. For graphs of up to seven vertices we provide complete characterization modulo local unitary transformations and graph isomorphisms
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Aichner, Bernhard
A1  - Bussian, Bernd M.
A1  - Lehnik-Habrink, Petra
A1  - Hein, Sebastian
T1  - Regionalized concentrations and fingerprints of polycyclic aromatic hydrocarbons (PAHs) in German forest soils
JF  - Environmental pollution
N2  - Samples of 474 forest stands in Germany were analysed for concentrations of polycyclic aromatic hydrocarbons (PAHs) in three sampling depths. Enhanced concentrations were mainly found at spots relatively close to densely industrialized and urbanized regions and at some topographically elevated areas. Average enrichment factors between mineral soil and humic layer depend on humus type i.e. decrease from mull via moder to more Based on their compound-patterns, the observed samples could be assigned to three main clusters. For some parts of our study area a uniform assignment of samples to clusters over larger regions could be identified. For instance, samples taken at vicinity to brown-coal strip-mining districts are characterized by high relative abundances of low-molecular-weight PAHs. These results suggest that PAHs are more likely originated from local and regional emitters rather than from long-range transport and that specific source-regions can be identified based on PAH fingerprints. (C) 2015 Elsevier Ltd. All rights reserved.
KW  - Organic pollutants
KW  - PAHs
KW  - Soil
KW  - Emissions
KW  - Long-range transport
KW  - Enrichment factor
KW  - Humic layer
KW  - Mineral soil
KW  - O horizon
Y1  - 2015
U6  - https://doi.org/10.1016/j.envpol.2015.03.026
SN  - 0269-7491
SN  - 1873-6424
VL  - 203
SP  - 31
EP  - 39
PB  - Elsevier
CY  - Oxford
ER  -