当前期刊: Annals of Physics Go to current issue    加入关注   
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Measurement of gravitational acceleration by cold atom multimode interference in the anharmonic potential
    Ann. Phys. (IF 2.267) Pub Date : 2020-06-03
    Tian-Chen He; Peng-Bin Niu; Ji Li

    We investigated the anharmonic effects on the dynamics and measurement accuracy of a multimode cold atomic interferometer driven by two Kapitza-Dirac pulses. The first Kapitza-Dirac pulse creates several spatially addressable modes from the ground state of an anharmonic trap and the external field. These modes evolve along different paths and coherently recombine under the anharmonic potential. The

    更新日期:2020-06-03
  • Normal modes for N identical particles: A study of the evolution of collective behavior from few-body to many-body
    Ann. Phys. (IF 2.267) Pub Date : 2020-06-01
    D.K. Watson

    Normal mode dynamics are ubiquitous in nature underlying the motions of diverse interacting systems from the behavior of rotating stars to the vibration of crystal structures. These behaviors are composed of simple collective motions of the N interacting particles which move with the same frequency and phase, thus encapsulating many-body effects into simple dynamic motions. In this study, I investigate

    更新日期:2020-06-01
  • Hayward black holes in Einstein–Gauss–Bonnet gravity
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-30
    Arun Kumar; Dharm Veer Singh; Sushant G. Ghosh

    The Hayward metric is a spherically symmetric charged regular black holes, a modification of the Reisnner–Nordström black holes of Einstein’s equations coupled to nonlinear electrodynamics. We consider Einstein–Gauss–Bonnet gravity (EGB) coupled to nonlinear electrodynamics to present an exact five dimension (5D) Hayward black holes with a regular center, having inner (Cauchy) and outer (event) horizons

    更新日期:2020-05-30
  • Transport properties of strongly coupled electron–phonon liquids
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-30
    Alex Levchenko; Jörg Schmalian

    In this work we consider the hydrodynamic behavior of a coupled electron–phonon fluid, focusing on electronic transport under the conditions of strong phonon drag. This regime occurs when the rate of phonon equilibration due to e.g. umklapp scattering is much slower than the rate of normal electron–phonon collisions. Then phonons and electrons form a coupled out-of-equilibrium state where the total

    更新日期:2020-05-30
  • Autonomous dynamical system of Einstein–Gauss–Bonnet cosmologies
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-28
    N. Chatzarakis; V.K. Oikonomou

    In this paper, we study the phase space of cosmological models in the context of Einstein–Gauss–Bonnet theory. More specifically, we consider a generalized dynamical system that encapsulates the main features of the theory and for the cases that this is rendered autonomous, we analyze its equilibrium points and stable and unstable manifolds corresponding to several distinct cosmological evolutions

    更新日期:2020-05-28
  • The impact of spheroidicity on the stability of polytropic spheres
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-28
    Anand Kaisavelu; S. Thirukkanesh; Megan Govender; S.D. Maharaj

    We investigate the stability of polytropic spheres in classical general relativity influenced by a departure from homogeneous spherical symmetry. We utilize the Vaidya-Tikekar ansatz to generate models of superdense stars obeying a polytropic equation of state of the form pr=κρ1+1n−β. Models with polytropic index n=1 (quadratic equation of state) and n=2 are generated for the general spheroidal parameter

    更新日期:2020-05-28
  • Traversable wormholes in light of class I approach
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-28
    Francisco Tello-Ortiz; E. Contreras

    In this work, we employ the class I approach to obtain wormhole solutions in the framework of general relativity in two different ways. Firstly, we propose a suitable red-shift function in order to find its associated shape function. Afterwards, we solve the inverse problem, namely, we impose the well known Morris–Thorne shape function to obtain the corresponding red-shift. It is found that, on one

    更新日期:2020-05-28
  • Quantum Hall effect induced by electron–phonon interaction
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-19
    Andreas Sinner; Klaus Ziegler
    更新日期:2020-05-19
  • Heat transfer in a nonequilibrium spin-boson model: A perturbative approach
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-19
    Wei Wu; Wen-Li Zhu

    We investigate the heat transport in a nonequilibrium spin-boson model, where a two-level system bridging two harmonic reservoirs at different temperatures, by employing a unitary transformation along with a resolvent operator expansion technique. Analytical expressions of the heat current and the thermal conductance of this model are obtained. Compared with the performances of other methods, namely

    更新日期:2020-05-19
  • A theory of electrodynamic response for bounded metals: Surface capacitive effects
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-19
    Hai-Yao Deng

    We report a general macroscopic theory for the electrodynamic response of semi-infinite metals (SIMs). The theory includes the hitherto overlooked capacitive effects due to the finite spatial extension of a surface. The basic structure of this theory is independent of the particulars of electron dynamics. Analytical expressions have been obtained of the charge density–density response function, which

    更新日期:2020-05-19
  • Linear in temperature resistivity in the limit of zero temperature from the time reparameterization soft mode
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-19
    Haoyu Guo; Yingfei Gu; Subir Sachdev

    The most puzzling aspect of the ‘strange metal’ behavior of correlated electron compounds is that the linear in temperature resistivity often extends down to low temperatures, lower than natural microscopic energy scales. We consider recently proposed deconfined critical points (or phases) in models of electrons in large dimension lattices with random nearest-neighbor exchange interactions. The criticality

    更新日期:2020-05-19
  • The effect of superconducting fluctuations on the ac conductivity of a 2D electron system in the diffusive regime
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-08
    I.S. Burmistrov

    We report a complete analytical expression for the one-loop correction to the ac conductivity σ(ω) of a disordered two-dimensional electron system in the diffusive regime. The obtained expression includes the weak localization and Altshuler–Aronov corrections as well as the corrections dueto superconducting fluctuations above superconducting transition temperature. The derived expression has no 1∕(iω)

    更新日期:2020-05-08
  • Speeding up the creation of coherent superposition states by shortcut-to-adiabaticity means
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-08
    Hui Sun; Ning Xu; Shuangli Fan; Mingwei Liu

    We propose protocols of loop stimulated Raman shortcut-to-adiabatic passage (STIRSAP) and modified-STIRSAP to speed up the creation of arbitrary high fidelity coherent superposition states (F≃0.999). In loop- and modified-STIRSAP protocols, the nonadiabatic coupling between the dark and bright states can be canceled by an additional microwave pulse and modified pump and Stokes pulses, respectively

    更新日期:2020-05-08
  • Multi-valued vortex solutions to the Schrödinger equation and radiation
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-08
    Mark Davidson

    This paper addresses the single-valued requirement for quantum wave functions when they are analytically continued in the spatial coordinates. This is particularly relevant for de Broglie–Bohm, hydrodynamic, or stochastic models of quantum mechanics where the physical basis for single-valuedness has been questioned. It first constructs a large class of multi-valued wave functions based on knotted vortex

    更新日期:2020-05-08
  • Thermodynamics of Schwarzschild-like black holes in modified gravity models
    Ann. Phys. (IF 2.267) Pub Date : 2020-05-04
    D.A. Gomes; R.V. Maluf; C.A.S. Almeida

    Over the last decades, many methods were developed to prove Hawking radiation. Recently, a semiclassical method known as the tunneling method has been proposed as a more straightforward way of derivating black hole thermodynamical properties. This method has been widely applied to a vast sort of spacetimes with satisfactory results. In this work, we obtain the black hole thermodynamics in the presence

    更新日期:2020-05-04
  • Scalar fields in a five-dimensional Lovelock black hole spacetime
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-30
    H.S. Vieira

    We study the interaction between massive scalar fields and the gravitational field produced by a higher dimensional Schwarzschild solution in a string cloud model. Exact analytical solutions of both angular and radial parts of the Klein–Gordon equation are obtained in terms of the three-dimensional spherical harmonics and general Heun functions, respectively. From these solutions, we examine the interesting

    更新日期:2020-04-30
  • Quantum fate of timelike naked singularity with scalar hair
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-30
    O. Svítek; T. Tahamtan; Adamantia Zampeli

    We study the quantum fate of a naked curvature singularity sourced by a scalar field via several methods and compare the results obtained. The first method relies on relativistic quantum mechanics on a fixed background employing the Klein–Gordon and the Dirac equations for a static spacetime. We show that both the Klein–Gordon and the Dirac particles feel this singularity therefore this method does

    更新日期:2020-04-30
  • Bound orbits around Bardeen black holes
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-25
    Bo Gao; Xue-Mei Deng

    A massive particle orbiting around a regular black hole (e.g., a Bardeen one) provides a lot of information about the black hole, allowing one to investigate the problem of spacetime singularities and get an insight into quantum gravity. In the present work, the bound orbits of the particle around the Bardeen black hole have been established by using a taxonomy proposed by Levin and Perez-Giz. It clearly

    更新日期:2020-04-25
  • Electron–phonon and electron–electron interaction effects in twisted bilayer graphene
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-23
    Sankar Das Sarma; Fengcheng Wu

    By comparing with recently available experimental data from several groups, we critically discuss the manifestation of continuum many body interaction effects in twisted bilayer graphene (tBLG) with small twist angles and low carrier densities, which arise naturally within the Dirac cone approximation for the non-interacting band structure. We provide two specific examples of such continuum many body

    更新日期:2020-04-24
  • Eliashberg theory of phonon-mediated superconductivity – When it is valid and how it breaks down
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-23
    Andrey V. Chubukov; Artem Abanov; Ilya Esterlis; Steven A. Kivelson

    We analyze the validity of Eliashberg theory of phonon-mediated superconductivity in 2D systems in light of recent extensive Monte-Carlo studies of the Holstein model. Conventional wisdom says that Eliashberg theory is applicable as long as vertex corrections remain small. For small ratio of the phonon energy Ω0 and the Fermi energy EF, this condition is supposed to hold even when the dimensionless

    更新日期:2020-04-23
  • Charged anisotropic Bardeen spheres admitting conformal motion
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-23
    M. Farasat Shamir; G. Mustafa

    Symmetries can play a vital role to develop the natural relation between geometry and matter through the Einstein field equations. The main purpose of this paper is to propose a new family of charged compact stars solutions using conformal Killing symmetries. The prominent feature of current study is to consider Bardeen model to describe as an exterior spacetime (Bardeen, 1968). This makes the analysis

    更新日期:2020-04-23
  • Generating perfect fluid solutions in isotropic coordinates
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-23
    P. Valtancoli

    We explore the symmetry group of the pressure isotropy condition in isotropic coordinates finding a rich structure. We work out some specific examples.

    更新日期:2020-04-23
  • Quasinormal modes of black holes in 5D Gauss–Bonnet gravity combined with non-linear electrodynamics
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-23
    M.S. Churilova; Z. Stuchlík

    Quasinormal modes of black holes were previously calculated in a non-linear electrodynamics and in the Gauss–Bonnet gravity theory. Here we take into consideration both of the above factors and find quasinormal modes of a (massive) scalar field in the background of a black hole in the five-dimensional Einstein–Gauss–Bonnet gravity coupled to a non-linear electrodynamics having Maxwellian weak-field

    更新日期:2020-04-23
  • Superintegrability and the dual −1 Hahn algebra in superconformal quantum mechanics
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-22
    Pierre-Antoine Bernard; Julien Gaboriaud; Luc Vinet

    A two-dimensional superintegrable system of singular oscillators with internal degrees of freedom is identified and exactly solved. Its symmetry algebra is seen to be the dual −1 Hahn algebra which describes the bispectral properties of the polynomials with the same name that are essentially the Clebsch–Gordan coefficients of the superconformal algebra osp(1|2). It is also shown how this superintegrable

    更新日期:2020-04-22
  • Analyses of Mössbauer experiments in a rotating system: Proper and improper approaches
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-22
    Alexander L. Kholmetskii; Tolga Yarman; O. Yarman; M. Arik

    We examine various attempts to interpret the results of modern Mössbauer rotor experiments and show that the most recent approach developed by Podosenov et al. (0000) to understand these results implies an experimental configuration which has never been realized in the known experiments on this subject, and thus leaves the problem of the physical interpretation of the observed energy shift between

    更新日期:2020-04-22
  • Rainbow gravity corrections to the information flux of a black hole and the sparsity of Hawking radiation
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-21
    Zhong-Wen Feng; Xia Zhou; Shi-Qi Zhou; Dan-Dan Feng

    In this paper, we investigated the information flux of Schwarzschild black hole and the sparsity of Hawking radiation in the presence of rainbow gravity. The results demonstrate that the rainbow gravity has a very significant effect on the information flux. When the mass of rainbow black hole approaches to the order of Planck scale, the Bekenstein entropy loss per emitted quanta in terms of the mass

    更新日期:2020-04-20
  • Response to Comments on the paper “Relativistic generalized uncertainty principle”
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-05
    Pasquale Bosso; Saurya Das; Vasil Todorinov

    We address the comments on our paper (Todorinov et al., 2019) presented in Chargui (2020). We show that the points raised in Chargui (2020) do not contain any new results or valid criticisms.

    更新日期:2020-04-20
  • Regular electric black hole in 2+1-dimensions Einstein-nonlinear electrodynamics
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-23
    S. Habib Mazharimousavi

    Recently, He and Ma introduced a generic method to generate static, circular symmetric regular black holes in 2+1-dimensional gravity minimally coupled to nonlinear electrodynamics (NED). In their formalism, they considered spacetimes filled with pure radial electric field and as examples four different cases were studied. In accordance with their method, in the weak field limit, the regular black

    更新日期:2020-04-20
  • Dynamics of the scalar shell in higher dimensions
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-23
    M. Sharif; Faisal Javed

    This paper investigates the dynamical evolution of thin-shell developed from a class of d-dimensional black holes. The components of stress–energy tensor of surface matter at thin-shell are evaluated through the Lanczos equations. The corresponding equations of motion and effective potential describe the expansion, collapse and saddle points. It is found that expanding and collapsing characteristics

    更新日期:2020-04-20
  • Classical dynamics from a unitary representation of the Galilei group
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-28
    A.D. Bermúdez Manjarres; M. Nowakowski; D. Batic

    We give a formulation of classical mechanics in the language of operators acting on a Hilbert space. The formulation given comes from a unitary irreducible representation of the Galilei group that is compatible with the basic postulates of classical mechanics, particularly the absence of an uncertainty principle between the position and momentum of a particle. It is shown that the theory exposed in

    更新日期:2020-04-20
  • Ramsey interferometry as a witness of acceleration radiation
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-28
    H.A.S. Costa; I.G. da Paz; P.R.S. Carvalho; Marcos Sampaio

    We adapt a typical Ramsey interferometer by inserting a linear accelerator capable of accelerating an atom inside a single-mode cavity. We demonstrate that this simple scheme allows us to estimate the effects of acceleration radiation via interferometric visibility. By using a Rydberg-like atom, our results suggest that, for the transition regime of the order of GHz and interaction time of 1 ns, acceleration

    更新日期:2020-04-20
  • Uncertainty relation for angle from a quantum-hydrodynamical perspective
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-27
    J.-P. Gazeau; T. Koide

    We revisit the problem of the uncertainty relation for angle by using quantum hydrodynamics formulated in terms of the stochastic variational method (SVM), where we need not define the angle operator. We derive both the Kennard and Robertson–Schrödinger inequalities for canonical variables in polar coordinates. The inequalities have state-dependent minimum values which can be smaller than ħ∕2 and then

    更新日期:2020-04-20
  • Polynomial potentials and coupled quantum dots in two and three dimensions
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-30
    Miloslav Znojil

    Polynomial potentials V(x)=x4+O(x2) and V(x)=x6+O(x4) were introduced, in the Thom’s purely geometric classification of bifurcations, as the benchmark models of the so called cusp catastrophes and of the so called butterfly catastrophes, respectively. Due to their asymptotically confining property, these two potentials are exceptional, viz., able to serve similar purposes even after quantization, in

    更新日期:2020-04-20
  • Influence of PT-symmetric complex potentials on the decoupling mechanism in quantum transport processes
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-30
    Lian-Lian Zhang; Wei-Jiang Gong; Guang-Yu Yi; An Du

    We consider one system in which the terminal dots of a one-dimensional quantum-dot chain couple equally to the left and right leads and study the influence of PT-symmetric complex potentials on the quantum transport process. It is found that in the absence of the complex potentials, remarkable decoupling and antiresonance phenomena are able to co-occur in the transport process. For the chains with

    更新日期:2020-04-20
  • Born’s Reciprocal Relativity theory, curved phase space, Finsler geometry and the cosmological constant
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-25
    Carlos Castro Perelman

    A very brief introduction of the history of Born’s Reciprocal Relativity Theory, Hopf algebraic deformations of the Poincare algebra, de Sitter algebra, and noncommutative spacetimes paves the road for the exploration of gravity in curved phase spaces within the context of the Finsler geometry of the cotangent bundle T∗M of spacetime. A scalar-gravity model is duly studied, and exact nontrivial analytical

    更新日期:2020-04-20
  • No anomalous canonical commutators induced by Berry’s phase
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-02
    Shinichi Deguchi; Kazuo Fujikawa

    The monopole-like singularity of Berry’s adiabatic phase in momentum space and associated anomalous Poisson brackets have been recently discussed in various fields. With the help of the results of an exactly solvable version of Berry’s model, we show that Berry’s phase does not lead to the deformation of the principle of quantum mechanics in the sense of anomalous canonical commutators. If one should

    更新日期:2020-04-20
  • Symmetric fracton matter: Twisted and enriched
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-19
    Yizhi You; Trithep Devakul; F.J. Burnell; S.L. Sondhi

    In this paper, we explore the interplay between symmetry and fracton order, motivated by the analogous close relationship for topologically ordered systems. Specifically, we consider models with 3D planar subsystem symmetry, and show that these can realize subsystem symmetry protected topological phases with gapless boundary modes. Gauging the planar subsystem symmetry leads to a fracton order in which

    更新日期:2020-04-20
  • Effect of the quintessential dark energy on weak deflection angle by Kerr–Newmann Black hole
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-18
    W. Javed; J. Abbas; A. Övgün

    In this work, we study the weak gravitational lensing in the background of Kerr–Newman black hole with quintessential dark energy. Initially, we compute the deflection angle of light by charged black hole with quintessential dark energy by utilizing the Gauss–Bonnet theorem. Firstly, we suppose the light rays on the equatorial plane in the axisymmetric spacetime. In doing so, we first find the corresponding

    更新日期:2020-04-20
  • Error-run-time trade-off in the adiabatic approximation beyond scaling relations
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-18
    M.R. Passos; M.M. Taddei; R.L. de Matos Filho

    The use of the adiabatic approximation in practical applications, as in adiabatic quantum computation, demands an assessment of the errors made in finite-time evolutions. Aiming at such scenarios, we derive bounds relating error and evolution time in the adiabatic approximation that go beyond typical scaling relations. Using the Adiabatic Perturbation Theory, we obtain leading-order expressions valid

    更新日期:2020-04-20
  • Landau quantization for an electric quadrupole moment of position-dependent mass quantum particles interacting with electromagnetic fields
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-16
    Zeinab Algadhi; Omar Mustafa

    Analogous to Landau quantization related to a neutral particle possessing an electric quadrupole moment, we generalize such a Landau quantization to include position-dependent mass (PDM) neutral particles. Using cylindrical coordinates, the exact solvability of PDM neutral particles with an electric quadrupole moment moving in electromagnetic fields is reported. The interaction between the electric

    更新日期:2020-04-20
  • Wetting transition in the McCoy-Wu model
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-16
    X.T. Wu

    The wetting transition is studied in the McCoy-Wu Ising model in which the random bonds are perfectly correlated in the direction parallel to the walls . The model is solved numerically on finite size lattices up to 200×2002. It is shown that the wetting transition is first-order. For a fixed surface field, the distribution of wetting transition temperature is obtained from 1000 samples for each size

    更新日期:2020-04-20
  • Drude conductivity of a granular metal
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-09
    David T.S. Perkins; Robert A. Smith

    We present a complete derivation of the analog to Drude conductivity in granular metals using diagrammatic methods. The derivation of Drude conductivity in a homogeneous metal using Kubo linear response theory is somewhat involved, with the evaluation of a singular double integral being required to cancel the diamagnetic response. We first provide a history and careful derivation of this standard result

    更新日期:2020-04-20
  • Non-Anderson critical scaling of the Thouless conductance in 1D
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-08
    Björn Sbierski; Sergey Syzranov

    We propose and investigate numerically a one-dimensional model which exhibits a non-Anderson disorder-driven transition. Such transitions have recently been attracting a great deal of attention in the context of Weyl semimetals, one-dimensional systems with long-range hopping and high-dimensional semiconductors. Our model hosts quasiparticles with the dispersion ±|k|αsignk with α<1∕2 near two points

    更新日期:2020-04-20
  • Emergent vortex–electron interaction from dualization
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-08
    Shantonu Mukherjee; Amitabha Lahiri

    We consider the Abelian Higgs model in 3+1 dimensions with vortex lines, into which charged fermions are introduced. This could be viewed as a model of a type-II superconductor with unpaired electrons (or holes), analogous to the boson–fermion model of high-Tc superconductors but one in which the bosons and fermions interact only through the electromagnetic gauge field. We investigate the dual formulation

    更新日期:2020-04-20
  • Fusion rules from entanglement
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-08
    Bowen Shi; Kohtaro Kato; Isaac H. Kim

    We derive some of the axioms of the algebraic theory of anyon (Kitaev, 2006) from a conjectured form of entanglement area law for two-dimensional gapped systems. We derive the fusion rules of topological charges and show that the multiplicities of the fusion rules satisfy these axioms. Moreover, even though we make no assumption about the exact value of the constant sub-leading term of the entanglement

    更新日期:2020-04-20
  • Transfer efficiency enhancement and eigenstate properties in locally symmetric disordered finite chains
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-07
    C.V. Morfonios; M. Röntgen; F.K. Diakonos; P. Schmelcher

    The impact of local reflection symmetry on wave localization and transport within finite disordered chains is investigated. Local symmetries thereby play the role of a spatial correlation of variable range in the finite system. We find that, on ensemble average, the chain eigenstates become more fragmented spatially for intermediate average symmetry domain sizes, depending on the degree of disorder

    更新日期:2020-04-20
  • Thermodynamics of antiferromagnetic solids in magnetic fields
    Ann. Phys. (IF 2.267) Pub Date : 2020-04-07
    Tomáš Brauner; Christoph P. Hofmann

    We analyze the thermodynamic properties of antiferromagnetic solids subjected to a combination of mutually orthogonal uniform magnetic and staggered fields. Low-temperature series for the pressure, order parameter and magnetization up to two-loop order in the effective expansion are established. We evaluate the self-energy and the dispersion relation of the dressed magnons in order to discuss the impact

    更新日期:2020-04-20
  • Strange metal state near quantum superconductor-metal transition in thin films
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-31
    Konstantin S. Tikhonov; Mikhail V. Feigel’man

    We develop a theory of quantum T=0 phase transition (q–SMT) between metal and superconducting ground states in a two-dimensional metal with frozen-in spatial fluctuations δλ(r) of the Cooper attraction constant. When strength of fluctuations δλ(r) exceeds some critical magnitude, usual mean-field-like scenario of the q–SMT breaks down due to spontaneous formation of local droplets of superconducting

    更新日期:2020-04-20
  • Fluctuational anomalous Hall and Nernst effects in superconductors
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-26
    Songci Li; Alex Levchenko

    In this work we develop microscopic kinetic theory of the anomalous Hall and Nernst effects in superconductors induced by fluctuations in the vicinity of the critical transition temperature. The technical analysis is carried out within the Matsubara diagrammatic technique and linear response Kubo formula with disorder averaging and an analytical continuation. It is shown that asymmetric skew-scattering

    更新日期:2020-04-20
  • Upper critical field in ferromagnetic metals with triplet pairing
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-19
    V.P. Mineev

    The theory of triplet superconductivity in ferromagnetic metals based on electron–electron interaction by spin fluctuation exchange is developed. The equations for the upper critical field temperature dependence are derived. In contrast to the similar equations for the superconductivity in two band metals they contain the pairing amplitudes and the Fermi velocities depending on magnetic field. The

    更新日期:2020-04-20
  • The interplay between superconductivity and non-Fermi liquid at a quantum-critical point in a metal
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-19
    Andrey V. Chubukov; Artem Abanov; Yuxuan Wang; Yi-Ming Wu

    Near a quantum-critical point, a metal reveals two competing tendencies: destruction of fermionic coherence and attraction in one or more pairing channels. We analyze the competition within Eliashberg theory for a class of quantum-critical models with an effective dynamical electron–electron interaction V(Ωm)∝1∕|Ωm|γ (the γ-model) for 0<γ<1. We argue that the two tendencies are comparable in strength

    更新日期:2020-04-20
  • Pair correlation in nano systems
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-18
    Vladimir Z. Kresin; Yurii N.Ovchinnikov

    Metallic nanoclusters and aromatic molecules are nano systems which display pair correlation similar to that in usual superconductors. Metallic clusters contain delocalized electrons whose states form energy shells similar to those in atoms or nuclei. Under special but perfectly realistic conditions, superconducting pairing in metallic nanoclusters is very strong. For realistic sets of parameters one

    更新日期:2020-04-20
  • Superconductivity in dilute SrTiO3: A review
    Ann. Phys. (IF 2.267) Pub Date : 2020-03-12
    Maria N. Gastiasoro; Jonathan Ruhman; Rafael M. Fernandes

    Doped SrTiO3, one of the most dilute bulk systems to display superconductivity, is perhaps the first example of an unconventional superconductor, as it does not fit into the standard BCS paradigm. More than five decades of research has revealed a rich temperature-carrier concentration phase diagram that showcases a superconducting dome, proximity to a putative quantum critical point, Lifshitz transitions

    更新日期:2020-04-20
  • Moiré superconductivity
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-29
    Ivar Martin

    Recently, superconductivity was discovered at very low densities in slightly misaligned graphene multilayers. Surprisingly, despite extremely low electronic density (about 10−4 electrons per unit cell), these systems realize strong-coupling superconductivity, with the transition temperature being a large fraction of the Fermi energy (Tc∼0.1ϵF). Here we propose a qualitative explanation for this remarkable

    更新日期:2020-04-20
  • The unreasonable effectiveness of Eliashberg theory for pairing of non-Fermi liquids
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-26
    Debanjan Chowdhury; Erez Berg

    The paradigmatic Migdal–Eliashberg theory of the electron–phonon problem is central to the understanding of superconductivity in conventional metals. This powerful framework is justified by the smallness of the Debye frequency relative to the Fermi energy, and allows an enormous simplification of the full many-body problem. However, superconductivity is found also in many families of strongly-correlated

    更新日期:2020-04-20
  • Eliashberg equations for an electron–phonon version of the Sachdev–Ye–Kitaev model: Pair breaking in non-Fermi liquid superconductors
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-24
    Daniel Hauck; Markus J. Klug; Ilya Esterlis; Jörg Schmalian

    We present a theory that is a non-Fermi-liquid counterpart of the Abrikosov–Gor’kov pair-breaking theory due to paramagnetic impurities in superconductors. To this end we analyze a model of interacting electrons and phonons that is a natural generalization of the Sachdev–Ye–Kitaev-model. In the limit of large numbers of degrees of freedom, the Eliashberg equations of superconductivity become exact

    更新日期:2020-04-20
  • Giant microwave absorption in s- and d- wave superconductors
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-19
    M. Smith; A.V. Andreev; B.Z. Spivak

    We discuss a new mechanism of microwave absorption in s- and d-wave superconductors, which arises in the presence of a dc supercurrent in the system. It produces a contribution to the ac conductivity that is proportional to the inelastic quasiparticle relaxation time. This contribution also determines the supercurrent dependence of the conductivity. It may significantly exceed the conventional contribution

    更新日期:2020-04-20
  • Driven-dissipative dynamics of atomic ensembles in a resonant cavity: Quasiperiodic route to chaos and chaotic synchronization
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-19
    Aniket Patra; Boris L. Altshuler; Emil A. Yuzbashyan

    We analyze the origin and properties of the chaotic dynamics of two atomic ensembles in a driven-dissipative experimental setup, where they are collectively damped by a bad cavity mode and incoherently pumped by a Raman laser. Starting from the mean-field equations, we explain the emergence of chaos by way of quasiperiodicity — presence of two or more incommensurate frequencies. This is known as the

    更新日期:2020-04-20
  • The discovery, disappearance and re-emergence of radiation-stimulated superconductivity
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-19
    T.M. Klapwijk; P.J. de Visser

    We trace the historical fate of experiment and theory of microwave-stimulated superconductivity as originally reported for constriction-type superconducting weak links. It is shown that the observed effect disappeared by improving weak links to obtain the desired Josephson properties. Separate experiments were carried out to evaluate the validity of the proposed theory of Eliash’berg for energy-gap-enhancement

    更新日期:2020-04-20
  • Eliashberg theory: A short review
    Ann. Phys. (IF 2.267) Pub Date : 2020-02-18
    F. Marsiglio

    Eliashberg theory is a theory of superconductivity that describes the role of phonons in providing the attractive interaction between two electrons. Phonon dynamics are taken into account, thus giving rise to retardation effects that impact the electrons, in the form of a frequency-dependent electron self-energy. In the superconducting state, this means that the order parameter, generally considered

    更新日期:2020-04-20
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
Springer化学材料学
骄傲月
如何通过Nature平台传播科研成果
跟Nature、Science文章学绘图
隐藏1h前已浏览文章
中洪博元
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
南开大学
朱守非
廖良生
郭东升
汪铭
伊利诺伊大学香槟分校
徐明华
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug