@article{MuellerHaakhCalarcoetal.2011,
  author    = {M{\"u}ller, Matthias M. and Haakh, Harald R. and Calarco, Tommaso and Koch, Christiane P. and Henkel, Carsten},
  title     = {Prospects for fast Rydberg gates on an atom chip},
  series = {Quantum information processing},
  volume    = {10},
  journal   = {Quantum information processing},
  number    = {6},
  publisher = {Springer},
  address   = {New York},
  issn      = {1570-0755},
  doi       = {10.1007/s11128-011-0296-0},
  pages     = {771 -- 792},
  year      = {2011},
  abstract  = {Atom chips are a promising candidate for a scalable architecture for quantum information processing provided a universal set of gates can be implemented with high fidelity. The difficult part in achieving universality is the entangling two-qubit gate. We consider a Rydberg phase gate for two atoms trapped on a chip and employ optimal control theory to find the shortest gate that still yields a reasonable gate error. Our parameters correspond to a situation where the Rydberg blockade regime is not yet reached. We discuss the role of spontaneous emission and the effect of noise from the chip surface on the atoms in the Rydberg state.},
  language  = {en}
}
@article{HaakhIntravaia2013,
  author    = {Haakh, Harald R. and Intravaia, Francesco},
  title     = {Mode structure and polaritonic contributions to the Casimir effect in a magnetodielectric cavity},
  series = {Physical review : A, Atomic, molecular, and optical physics},
  volume    = {88},
  journal   = {Physical review : A, Atomic, molecular, and optical physics},
  number    = {5},
  publisher = {American Physical Society},
  address   = {College Park},
  issn      = {1050-2947},
  doi       = {10.1103/PhysRevA.88.052503},
  pages     = {13},
  year      = {2013},
  abstract  = {We present a full analysis of the mode spectrum in a cavity formed by two parallel plates, one of which is magnetodielectric (metamaterial) while the other one is metallic, and obtain dispersion relations in closed form. The optical properties of the cavity walls are described in terms of realistic models for effective permittivity and permeability. Surface polaritons, i.e., electromagnetic modes that have at least partly an evanescent character, are shown to dominate the Casimir interaction at small separations. We analyze in detail the s-polarized polaritons, which are a characteristic feature of a magnetodielectric configuration, and discuss their role in the repulsive Casimir force.},
  language  = {en}
}
@article{HaakhHenkelSpagnoloetal.2014,
  author    = {Haakh, Harald R. and Henkel, Carsten and Spagnolo, Salvatore and Rizzuto, Lucia and Passante, Roberto},
  title     = {Dynamical Casimir-Polder interaction between an atom and surface plasmons},
  series = {Physical review : A, Atomic, molecular, and optical physics},
  volume    = {89},
  journal   = {Physical review : A, Atomic, molecular, and optical physics},
  number    = {2},
  publisher = {American Physical Society},
  address   = {College Park},
  issn      = {1050-2947},
  doi       = {10.1103/PhysRevA.89.022509},
  pages     = {11},
  year      = {2014},
  abstract  = {We investigate the time-dependent Casimir-Polder potential of a polarizable two-level atom placed near a surface of arbitrary material, after a sudden change in the parameters of the system. Different initial conditions are taken into account. For an initially bare ground-state atom, the time-dependent Casimir-Polder energy reveals how the atom is "being dressed" by virtual, matter-assisted photons. We also study the transient behavior of the Casimir-Polder interaction between the atom and the surface starting from a partially dressed state, after an externally induced change in the atomic level structure or transition dipoles. The Heisenberg equations are solved through an iterative technique for both atomic and field operators in the medium-assisted electromagnetic field quantization scheme. We analyze, in particular, how the time evolution of the interaction energy depends on the optical properties of the surface, in particular on the dispersion relation of surface plasmon polaritons. The physical significance and the limits of validity of the obtained results are discussed in detail.},
  language  = {en}
}