Annalen der Physik

Cover image for Vol. 527 Issue 7-8

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

Editor: Stefan Hildebrandt

Impact Factor: 3.048

ISI Journal Citation Reports © Ranking: 2014: 12/78 (Physics Multidisciplinary)

Online ISSN: 1521-3889

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


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  1. Original Papers

    1. Describing many-body bosonic waveguide scattering with the truncated Wigner method

      Julien Dujardin, Thomas Engl, Juan Diego Urbina and Peter Schlagheck

      Article first published online: 29 SEP 2015 | DOI: 10.1002/andp.201500113

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      We consider quasi-stationary scattering of interacting bosonic matter waves in one-dimensional waveguides, as they arise in guided atom lasers. We show how the truncated Wigner (tW) method, which corresponds to the semiclassical description of the bosonic many-body system on the level of the diagonal approximation, can be utilized in order to describe such many-body bosonic scattering processes. Special emphasis is put on the discretization of space at the exact quantum level, in order to properly implement the semiclassical approximation and the tW method, as well as on the discussion of the results to be obtained in the continuous limit.

    2. Complex scattering as canonical transformation: A semiclassical approach in Fock space

      Thomas Engl, Juan Diego Urbina, Quirin Hummel and Klaus Richter

      Article first published online: 29 SEP 2015 | DOI: 10.1002/andp.201500151

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      Computing scattering amplitudes between Fock states for indistinguisahble but non-interacting Bosons is known to be a computationally hard problem known as the Boson Sampling problem. As is shown here, for a large number of particles these scattering amplitudes can be interpreted in terms of interference between mean field solutions.



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      Towards quantum cybernetics

      Davide Girolami, Rebecca Schmidt and Gerardo Adesso

      Article first published online: 19 SEP 2015 | DOI: 10.1002/andp.201500133

      Cybernetics is a successful meta-theory to model the regulation of complex systems from an abstract information-theoretic viewpoint, regardless of the properties of the system under scrutiny. Fundamental limits to the controllability of an open system can be formalized in terms of the law of requisite variety, which is derived from the second law of thermodynamics and suggests that establishing correlations between the system of interest and a controller is beneficial. These concepts are briefly reviewed, and the chances, challenges and potential gains arising from the generalisation of such a framework to the quantum domain are discussed.

  3. Original Papers

    1. Casimir-Polder potentials on extended molecules

      Johannes Fiedler and Stefan Scheel

      Article first published online: 19 SEP 2015 | DOI: 10.1002/andp.201500224

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      Casimir-Polder forces belongs to the dispersion forces and describes the interaction between a microscopic particle and a macroscopic body. Current experiments investigate the interaction between molecules or clusters and dielectric bodies, e.g. matter-wave interference. In this article we show the influence of the finite size with respect to extension and rotation on the interaction of a molecule with a dielectric surface.

    2. On the Trail of the Higgs Boson

      Michael E. Peskin

      Article first published online: 11 SEP 2015 | DOI: 10.1002/andp.201500225

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      This article reviews the role of the Higgs field in the Standard Model of particle physics and discusses the question of why the gauge symmetry of the model is spontaneously broken. Solutions to this question require new particles and forces. General properties of these new particles, and some specific examples, are presented.

    3. Cosmological implications of Higgs field fluctuations during inflation

      A. V. Grobov, R. V. Konoplich and S. G. Rubin

      Article first published online: 8 SEP 2015 | DOI: 10.1002/andp.201500127

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      The discovery of the Higgs boson and measurements of its mass play an important role in our understanding of the early universe. They indicate that the Higgs potential becomes unstable at large energy scale and this instability is cosmologically relevant. Large quantum fluctuations during inflation could result in a universe landed in wrong vacuum. In this paper it is shown that depending on the instability scale the fate of the universe could be drastically different.

    4. An analogue of the quantum Hall conductivity for a magnetic quadrupole moment

      Itallo Costa Fonseca and Knut Bakke

      Article first published online: 8 SEP 2015 | DOI: 10.1002/andp.201500183

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      The quantum dynamics of a moving particle with a magnetic quadrupole moment that interacts with electric and magnetic fields is introduced. Then, it is discussed which conditions the external fields must satisfy so that an analogue of the Landau quantization can be obtained. Finally, by dealing with the lowest Landau level associated with the magnetic quadrupole system, an analogue of the quantum Hall conductivity is obtained.

    5. Information entropy as a measure of tunneling and quantum confinement in a symmetric double-well potential

      Neetik Mukherjee, Arunesh Roy and Amlan K. Roy

      Article first published online: 24 AUG 2015 | DOI: 10.1002/andp.201500196

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      Information-based uncertainty quantities like Fisher information, Shannon entropy, Onicescu energy and Onicescu-Shannon entropy are shown to be better a measure than conventional uncertainty product in interpreting purely quantum mechanical phenomena, such as, tunneling and quantum confinement in a symmetric doublewell potential of the form,

      • display math

      These studies show appearences of extrema at certain characteristic β values explaining the interplay of localisation and delocalisation of the particle.

  4. Rapid Research Letter

    1. Charge-induced electromagnetic resonances in nanoparticles

      Miroslav Kocifaj, Jozef Klačka, František Kundracik and Gorden Videen

      Article first published online: 24 AUG 2015 | DOI: 10.1002/andp.201500202

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      We report new developments in electromagnetic scattering theory in which charge-induced resonances in nanoparticles result from interaction with electromagnetic radiation. The net surface charge can be a significant factor in many systems, for instance, colloids of metallic particles. Among colloidal particles at liquid interfaces, charged nanoparticles are a fertile subject of new technological concepts and can be decisive in the development of new devices and novel technologies in the nanosciences, such as optical attenuators, modulators, and switches that can be turned on or off through the application of charge. For electrically charged particles, the resonant excitation of surface modes is governed by exc ess charges deposited on the particle surface. Charge-induced resonances appear in such systems that can reproduce previously unexplained phenomena, for instance, amplified microwave attenuation observed in sandstorms.

  5. Original Papers

    1. Dissipative Dynamics of Quantum Fluctuations

      Fabio Benatti, Federico Carollo and Roberto Floreanini

      Article first published online: 20 AUG 2015 | DOI: 10.1002/andp.201500165

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      Here, it is considered the mesoscopic behaviour emerging from an infinite quantum spin chain undergoing a microscopic dissipative, irreversible dynamics and from global states without long-range correlations and invariant under lattice translations and dynamics. It is shown that, from the fluctuations of one site spin observables whose linear span is mapped into itself by the dynamics, there emerge bosonic operators obeying a mesoscopic dissipative dynamics mapping Gaussian states into Gaussian states.

  6. Feature Articles

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      Low-energy precision tests of the standard model: a snapshot

      David W. Hertzog

      Article first published online: 7 AUG 2015 | DOI: 10.1002/andp.201500167

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      The deserved world's attention on the re-energized atom-smashing power of the Large Hadron Collider anticipates the discovery of new physics beyond the Standard Model. However, there is a quieter, alternative and complementary approach, which does not rely on Earth-shattering high energy collisions, but instead uses exquisite precision to hunt for deviations from Standard Model expectations. In this review, we describe a series of these unique experiments that may have far reaching implications.

  7. Original Papers

    1. Quadripartite entanglement from coupled type I second harmonic generation

      Guo Juan, Zhai Shu-qin and Zhai Ze-hui

      Article first published online: 6 AUG 2015 | DOI: 10.1002/andp.201500182

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      The continuous variable quadripartite entanglement generated by the coupled type I second harmonic generation are investigated below threshold. The entanglement degree versus normalized frequency, pump parameter, and coupling parameter are analyzed. The four output fields are proved to be entangled beams in separable locations. The result shows that the coupled system can be used to produce compact multimode entangled resource for quantum communication.

  8. Review Articles

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      Dark matter searches

      Laura Baudis

      Article first published online: 31 JUL 2015 | DOI: 10.1002/andp.201500114

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      There is overwhelming evidence for dark matter in our Universe. So far, it is based on indirect observations, where its influence on visible matter is studied. A large programme of experiments aiming to directly detect this new form of matter in the laboratory, in space or to produce it at particles colliders is underway. These approaches are complementary to one another and exciting new results are expected within the current decade.

  9. Original Papers

    1. On the influence of underdamped vibrations on coherence and energy transfer times in light-harvesting complexes

      C. A. Mujica-Martinez and P. Nalbach

      Article first published online: 24 JUL 2015 | DOI: 10.1002/andp.201500139

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      The article studies the influence of coherent vibrational quantum modes on energy transfer dynamics in light-harvesting complexes. Coherent vibrational quantum modes coupled to the energy entrance pigment prolong coherent population oscilations between the entrance and neighbouring pigments. Modes coupled to the energy exit pigments enhance energy transfer speeds.

  10. Feature Articles

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      Dark energy in light of the discovery of the Higgs

      Edmund J. Copeland

      Article first published online: 21 JUL 2015 | DOI: 10.1002/andp.201500163

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      Perhaps the most perplexing fact about our Universe is that it is accelerating today due to some unknown form of Dark Energy which makes up 65% of the total energy density pie. In this brief article we discuss possible links between the Higgs field and the nature of Dark Energy and ask how might we test for the latter now that we know something about the former.

  11. Original Papers

    1. Coherent averaging

      Julien Mathieu Elias Fraïsse and Daniel Braun

      Article first published online: 7 JUL 2015 | DOI: 10.1002/andp.201500169

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      Quantum enhanced measurements are usually associated with highly entangled states. They allow one to achieve Heisenberg-limited scaling of the sensitivity of measurements. The coherent averaging scheme achieves the same without entanglement by modifying the basic information flow: instead of classically averaging measurement results from independent probes, the information is assembled in the quantum realm by means of an interaction of the probes with a common quantum bus.

    2. Vibrational relaxation and decoherence in structured environments: a numerical investigation

      Matteo Bonfanti, Keith H. Hughes, Irene Burghardt and Rocco Martinazzo

      Article first published online: 3 JUL 2015 | DOI: 10.1002/andp.201500144

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      This article investigates the effectiveness of classical, canonical position autocorrelation functions to compute the spectral density of the coupling needed to describe vibrational relaxation and decoherence in complex environments. The effect of anharmonicity and of a high-frequency “Debye” cutoff are addressed in detail, and the high-dimensional quantum dynamics of the associated independent oscillator models is investigated at T = 0 K with a numerically exact method.

  12. Feature Articles

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      Matter-antimatter asymmetry - aspects at low energy

      Lorenz Willmann and Klaus Jungmann

      Article first published online: 1 JUL 2015 | DOI: 10.1002/andp.201500008

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      The dominance of matter over antimatter in our universe today is an obvious and puzzling fact. It cannot be sufficiently explained in present physical frameworks built on symmetric conditions at the big bang. Known sources of CP violation are insufficient to explain the matter-antimatter asymmetry. CPT violation could alternatively provide an explanation and is therefore being searched for as well as are differences in the properties of particles and their antiparticles. New precision experiments at low energies provide for a promising way towards resolving this puzzle.

  13. Original Papers

    1. Quantum efficiencies in finite disordered networks connected by many-body interactions

      Adrian Ortega, Manan Vyas and Luis Benet

      Article first published online: 30 JUN 2015 | DOI: 10.1002/andp.201500140

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      Disordered centrosymmetric networks of fermionic or bosonic many-body systems with few-body interactions display remarkable statistical properties of the best transport efficiencies attained, with non-zero probability for perfect state transfer.

    2. Unraveling the Quantum State Mixing of Excitonic and Vibronic Excitations in the Dynamics of Molecular Aggregates

      Marco Schröter, Toñu Pullerits and Oliver Kühn

      Article first published online: 29 JUN 2015 | DOI: 10.1002/andp.201500148

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      The issue of quantum state mixing between excitonic and vibronic excitations in a molecular heterodimer coupled to a bath is addressed, combining dissipative exciton dynamics calculations and with calculations of the vibronic level structure. Coherent oscillations in the population dynamics, which are systematically discussed in terms of Fourier spectra for various Coulomb and vibronic coupling strengths, indicate a significant influence of quantum state mixing on the dynamics.

  14. Review Articles

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      Fundamental physics with cosmic particles

      Elisa Resconi

      Article first published online: 25 JUN 2015 | DOI: 10.1002/andp.201500146

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      The Standard Model of particle physics is extremely successful in describing the properties of matter and forces, although it leaves fundamental questions unanswered, like the existence of dark matter, the asymmetry of matter anti-matter in the universe, and the neutrino masses. Cosmic particles offer unique opportunities to address these many fundamental questions. Tests done with present and planned future missions are reviewed.

  15. Feature Articles

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      Phenomenology of the Pyramid Scheme

      Tom Banks

      Article first published online: 22 JUN 2015 | DOI: 10.1002/andp.201500210

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      This article gives a brief summary of the Pyramid Schemes, a class of supersymmetric models of particle physics below the 100 TeV scale, which is compatible both with existing experimental constraints and the very low scale of supersymmetry breaking implied by the idea of Cosmological Supersymmetry Breaking. This idea leads to novel solutions to some of the fine tuning problems of the conventional approach to particle phenomenology based in effective quantum field theory. Most notable is the novel resolution of the absence of CP violation in strong interaction physics. The Pyramid Schemes, in a certain range of parameters predict that squarks are much lighter than gluinos and that the lightest supersymmetric particle, apart from the gravitino, is a supersymmetric partner of one of the right handed leptons.

  16. Original Papers

    1. Edge magnetotransport in graphene: A combined analytical and numerical study

      Thomas Stegmann and Axel Lorke

      Article first published online: 17 JUN 2015 | DOI: 10.1002/andp.201500124

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      The current flow along the boundary of graphene stripes in a perpendicular magnetic field is studied theoretically. In the case of specular boundary reflections, the Hall resistance shows equidistant peaks due to classical cyclotron motion. When the magnetic field strength is increased, anomalous resistance oscillations appear. Solving the Dirac equation analytically within a simplified model, the oscillations are explained by the interference between the occupied edge states.

    2. State complexity and quantum computation

      Yu Cai, Huy Nguyen Le and Valerio Scarani

      Article first published online: 16 JUN 2015 | DOI: 10.1002/andp.201400199

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      The complexity of a quantum state may be closely related to the usefulness of the state for quantum computation. This link is discussed using the tree size of a multiqubit state, a complexity measure that has two noticeable features: it is in principle computable, and non-trivial lower bounds can be obtained, hence identifying truly complex states. The 2D cluster states are shown to have verifiable superpolynomial tree size.

    3. The Higgs boson, supersymmetry and dark matter : Relations and Perspectives

      Alexandre Arbey, Marco Battaglia and Farvah Mahmoudi

      Article first published online: 12 JUN 2015 | DOI: 10.1002/andp.201500007

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      The Higgs boson discovery at LHC starts an exciting program to understand the role of this particle in connection with New Physics and Cosmology. Supersymmetry is the best motivated and thoroughly formulated model of New Physics predicting a light Higgs and able to explain dark matter. This paper connects the study of the Higgs boson with the search for supersymmetry and dark matter at colliders and underground experiments.

  17. Feature Articles

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      The state of supersymmetry

      Stefan Pokorski

      Article first published online: 5 JUN 2015 | DOI: 10.1002/andp.201500162

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      There are many good reasons to favor supersymmetry as an extension of the Standard Model. But it may be more hidden than often expected and one should pursue experimental search for it, keeping in mind several different scenarios.

  18. Original Papers

    1. Semiclassical analysis of the electron-nuclear coupling in electronic non-adiabatic processes

      Federica Agostini, Seung Kyu Min and E. K. U. Gross

      Article first published online: 29 MAY 2015 | DOI: 10.1002/andp.201500108

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      In the context of the exact factorization of the electron-nuclear wave function, the time-dependent potential energy surface is calculated to propagate semiclassically frozen gaussians. The nuclear wave function, from the factorization, is reconstructed as the superposition of coherent states, the complex-valued frozen gaussians. This approximation is used to study the electron-nuclear coupling term in the electronic equation from the factorization, representing the nuclear effect on electronic dynamics.

  19. Feature Article

    1. Neutrino mass: A gateway to new physics

      Hirohisa. A. Tanaka

      Article first published online: 3 MAY 2015 | DOI: 10.1002/andp.201500105

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      The discovery of non-zero neutrino mass and mixing has opened a portal to physics beyond the Standard Model. The next decade promises critical developments with a program of ambitious experiments that will probe the fundamental nature of neutrino mass and mixing, and provide important clues on the primordial matter-dominance of the universe. The image shows an electron-like Cherenkov ring in the Super-Kamiokande detector arising from the conversion of a muon neutrino produced in the T2K neutrino beam to an electron neutrino through the neutrino oscillation process (image: courtesy of the T2K collabortion and the Kamioka Observatory, ICRR, University of Tokyo).

  20. Original Papers

    1. Capacitively coupled nano conductors : Ratchet currents and exchange fluctuation relations

      Robert Hussein and Sigmund Kohler

      Article first published online: 30 APR 2015 | DOI: 10.1002/andp.201500141

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      Quantum dots are often coupled to a point contact that measures the dot occupation. This setup can be employed beyond that purpose. For example, if a double quantum dot is strongly detuned, the shot noise of the point contact can induce a pump or ratchet current. Moreover, it allows testing the compliance of a master equation formalism with exact generalized equilibrium relations known as exchange fluctuation theorems.

    2. Scattering theory and thermodynamics of quantum transport

      Pierre Gaspard

      Article first published online: 30 APR 2015 | DOI: 10.1002/andp.201500121

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      Thermodynamic entropy is produced during the quantum transport of bosons or fermions through a small hole in a thin wall separating two reservoirs at different temperatures or densities. Yet, the Hamiltonian microdynamics is symmetric under time reversal. Time asymmetry arises at the statistical level of description after the paths of the scattering process are weighted by probabilities associated with the reservoirs where the particles are coming from.

    3. Flavour physics: Status and perspectives

      Andrzej J. Buras

      Article first published online: 29 APR 2015 | DOI: 10.1002/andp.201500103

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      In the coming flavour precision era a multitude of new quark and lepton flavour observables will be measured with high precision and theoretical calculations will improve. This will hopefully bring the discovery of new physics beyond the Standard Model. Most importantly the unique role of quark and lepton flavour physics in the coming years will be to allow us with the help of quantum fluctuations to get insight into the dynamics at length scales as short as inline image). The requirements that have to be met for such a flavour expedition to the Zeptouniverse to be successful are summarized.

  21. Review Articles

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      Supersymmetry after the Higgs

      Pran Nath

      Article first published online: 21 APR 2015 | DOI: 10.1002/andp.201500005

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      A brief review is given of the implications of a 126 GeV Higgs boson for the discovery of supersymmetry. The 126 GeV Higgs mass implies a large SUSY scale which explains the non-observation of sparticles thus far. The large scale also helps suppression of FCNC, CP violation effects and helps stabilize the proton against B&L violating dimension five operators. It is shown that the gluino, charginos, neutralinos, sleptons and a stop can be light and are the prime candidates for discovery at the LHC.

  22. Rapid Research Letter

    1. Anderson localization of Bogoliubov excitations on quasi-1D strips

      Christopher Gaul, Pierre Lugan and Cord A. Müller

      Article first published online: 2 APR 2015 | DOI: 10.1002/andp.201500106

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      The interplay of disorder and interaction is studied via the Anderson localization of Bogoliubov quasiparticles, the elementary excitations of disordered lattice Bose gases in quasi-one-dimensional geometries. The localization length is computed by a numerical transfer-matrix scheme. These results are described accurately by analytical formulas based on a weak-disorder expansion of backscattering mean free paths. This approach provides a framework for the description of transport and localization in mesoscopic systems of interacting bosons.

  23. 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. 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. 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.

    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.


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