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

VIEW

  1. 1 - 14
  1. Original Papers

    1. Quantum bottlenecks and unidirectional energy flow in molecules

      David M. Leitner and Hari Datt Pandey

      Article first published online: 26 MAR 2015 | DOI: 10.1002/andp.201500104

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      There is currently much interest in designing nanoscale thermal diodes, in which vibrational energy transport in one direction is more favorable than in the other. This paper presents a theoretical analysis of a molecular vibrational energy diode. It is shown that quantum mechanical bottlenecks to vibrational energy transfer in specific chemical groups give rise to a preferred direction of energy flow in the molecule.

    2. Nonlinear arcsin-electrodynamics

      Sergey I. Kruglov

      Article first published online: 26 MAR 2015 | DOI: 10.1002/andp.201500142

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      A new model of nonlinear electrodynamics with three parameters is suggested and investigated. It is shown that if the external constant magnetic field is present the phenomenon of vacuum birefringence takes place. The indices of refraction for two polarizations of electromagnetic waves, parallel and perpendicular to the magnetic induction field are calculated. The electric field of a point-like charge is not singular at the origin and the static electric energy is finite. The static electric energy of point-like particles for different parameters of the model is calculated. The canonical and symmetrical Belinfante energy-momentum tensors and dilatation current are obtained. It is demonstrated that the dilatation symmetry and dual symmetry are broken in the model suggested.

  2. Review Articles

    1. X-ray and neutron scattering on disordered nanosize clusters: a case study of lead-zirconate-titanate solid solutions

      Johannes Frantti and Yukari Fujioka

      Article first published online: 24 MAR 2015 | DOI: 10.1002/andp.201400219

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      Methods for modelling technologically important defects are reviewed. A numerical approach for simulating scattering intensities from clusters of different size and shape, possessing co-existing defects, is given. As an example material lead-zirconate- titanate is used, a classical and probably the most widely used ferro- and piezoelectric material. It is demonstrated how complex disorder cases can be modeled and pinpoint the signatures in x-ray and neutron scattering intensity evidencing crystalline disorder.

  3. Original Papers

    1. You have full text access to this OnlineOpen article
      Comparative analysis of electric field influence on the quantum wells with different boundary conditions. : I. Energy spectrum, quantum information entropy and polarization

      Oleg Olendski

      Article first published online: 18 MAR 2015 | DOI: 10.1002/andp.201400228

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      Qualitative – and to the large degree of precision, quantitative – explanation of the negative polarization of the excited states of the quantum well with arbitrary permutation of the Dirichlet and Neumann boundary conditions is based on the perturbation analysis of the evolution of the wave function under applied electric fields that also lead to the modification of the space and momentum quantum information entropies, which, however, always satisfy entropic uncertainty relation.

    2. Anderson transition for Google matrix eigenstates

      O. V. Zhirov and D. L. Shepelyansky

      Article first published online: 16 MAR 2015 | DOI: 10.1002/andp.201500110

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      Anderson transition, awarded by Nobel prize, appears in disordered solids separating insulator (localized) and metallic (delocalized) phases of electron transport. It exists also in random matrix ensembles of Hermitian matrices. Here, random matrix models of Markov chains and Google matrix Gare considered. The eigenvectors of G, and especially PageRank vector, are at the basis of Google search engine of World Wide Web and other directed networks. The results for random matrix models of G show that the Anderson transition, from localized (blue) to delocalized (rose) states, appears in a domain of complex eigenvalues λ of G at certain conditions (see Fig.).

    3. You have full text access to this OnlineOpen article
      Comparative analysis of electric field influence on the quantum wells with different boundary conditions : II. Thermodynamic properties

      Oleg Olendski

      Article first published online: 16 MAR 2015 | DOI: 10.1002/andp.201400229

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      Heat capacity for one fermion, contrary to the many-particle case, in the flat quantum well exhibits a pronounced maximum whose location on the temperature axis depends on the type of the boundary conditions and which is qualitatively and quantitatively explained by the interplay between the two lowest states. Electric field smoothes out and widens these extrema leading also to the evolution of other thermodynamic properties considered in canonical and two grand canonical ensembles.

  4. Review Articles

    1. Graded index photonic crystals: A review

      Qingyi Zhu, Lei Jin and Yongqi Fu

      Article first published online: 13 MAR 2015 | DOI: 10.1002/andp.201400195

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      Graded index photonic crystal is a new type of photonic crystals. This review firstly introduces different ways of designing graded index photonic crystals. Then the emphasis is put on typical applications of graded index photonics crystals. Calculating the effective refractive index and the focusing mechanism of the graded index photonic crystals is also discussed in the review.

    2. Utilization of inverse approach in the design of materials over nano- to macro-scale

      Vladan Mlinar

      Article first published online: 10 MAR 2015 | DOI: 10.1002/andp.201400190

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      An ideal way to design a material with a specific property would be to solve an inverse problem: use a physical property to predict structure. Here, proposed strategies of utilizing an inverse approach to design materials over nano- to macro-scales are discussed. Risks and limitations of the approach are analyzed and its dependence on factors such as structure parametrization, approximations in theoretical models, feedback from structural characterization is addressed.

  5. 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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