Annalen der Physik

Cover image for Vol. 527 Issue 1-2

Early View (Online Version of Record published before inclusion in an issue)

Editor: Stefan Hildebrandt

Online ISSN: 1521-3889

Associated Title(s): physica status solidi (RRL) - Rapid Research Letters, Advanced Materials, Laser & Photonics Reviews

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  1. 1 - 6
  1. Original Papers

    1. Chaotic level mixing in a two-band Bose-Hubbard model

      Carlos A. Parra-Murillo, Javier Madroñero and Sandro Wimberger

      Article first published online: 10 FEB 2015 | DOI: 10.1002/andp.201400200

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      The standard problem of Bloch bands is extended to a situation with many-body correlations. This gives a rich and experimentally accessible scenario for tests of quantum chaos and the study of a coherent sequence of Landau-Zener transitions and quantum thermalization. Since the time scales of strong interband mixing can be controlled at will, a fast thermalization and an engineering of the interband dynamics is promising for future experiments.

    2. Relic photon temperature versus redshift and the cosmic neutrino background

      Ralf Hofmann

      Article first published online: 29 JAN 2015 | DOI: 10.1002/andp.201400197

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      A late-time modification of the (conformal) relation between the FLRW scale factor and the temperature of the cosmic microwave background is derived based on the postulate that fundamentally an SU(2) gauge principle underlies photon propagation. Consequences constructively address early re-ionisation, dark matter in the early universe, and the physics of cosmic neutrinos.

    3. Nonlocal effects in black body radiation

      Guilherme N. Bremm and Felipe T. Falciano

      Article first published online: 20 JAN 2015 | DOI: 10.1002/andp.201400214

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      Nonlocal electrodynamics is a formalism developed to include nonlocal effects in the measurement process in order to account for the impossibility of instantaneous measurement of physical fields. This theory modifies Maxwell's electrodynamics by eliminating the hypothesis of locality that assumes an accelerated observer simultaneously equivalent to a comoving inertial frame of reference. In this scenario, the transformation between an inertial and accelerated observer is generalized which affects the properties of physical fields. It is analyzed how a uniformly accelerated observer perceives a homogeneous and isotropic black body radiation.

    4. Non-equilibrium dynamics in dissipative Bose-Hubbard chains

      Georgios Kordas, Dirk Witthaut and Sandro Wimberger

      Article first published online: 14 JAN 2015 | DOI: 10.1002/andp.201400189

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      Recent advances in the fields of quantum information, quantum transport (also with biological clusters) and ultracold atoms have renewed the interest in open many-body quantum systems. Different setups are studied describing the dissipative dynamics of ultracold bosons in a one-dimensional lattice. The creation of mesoscopic superpositions of stable solitons are predicted and the impact of interactions and reservoir couplings on the non-equilibrium transport of the atoms is studied.

    5. Diffusion slowdown in the nanostructured liquid Ga-Sn alloy

      Dmitri Y. Podorozhkin, Elena V. Charnaya, Min Kai Lee, Lieh-Jeng Chang, Juergen Haase, Dieter Michel, Yurii A. Kumzerov and Alexsandr V. Fokin

      Article first published online: 12 JAN 2015 | DOI: 10.1002/andp.201400174

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      Nuclear spin relaxation of gallium isotopes in melted Ga-Sn alloy under nanoconfinement is much faster than in bulk, depends on field and isotope, and is dominated by quadrupole coupling. The evaluated time of atomic mobility increases gradually with decreasing pore size. Knight shift decreases under nanoconfinement depending on pore sizes.

    6. Energetic damping in electronic transport simulations on finite systems

      Tim Collet and Peter Schmitteckert

      Article first published online: 23 DEC 2014 | DOI: 10.1002/andp.201400173

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      In this paper, an implementation of energetic damping for fermionic transport simulations which respects particle conservation is presented. For this, nonhermitian terms in the Hamiltonian of the system are used. After an explanation of the method, it is demonstrated studying the current over time and I/V characteristics in the noninteracting resonant level model for spinless fermions.

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  1. 1 - 6

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