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  • Superconductivity in Graphene induced by the rotated layer
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-29
    D. Schmeltzer

    We linearize the Hamiltonian for Graphene in the vicinity of the nodes and obtain a two dimensional Dirac massless Hamiltonian for each layer. Including the spin–orbit a mass is introduced. The attractive interaction is obtained as a result of rotation of one of the layer. The mass introduced gives rise to attraction for small angle rotation. Using the spinors representation in the vicinity of the

  • Non-Abelian extension of the aether term and the Gribov problem
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-19
    D.R. Granado; C.P. Felix; I.F. Justo; A.Yu. Petrov; D. Vercauteren

    In this paper, we treat the proper path integral quantization of the Yang–Mills-aether (YM-aether) system by dealing with the extra gauge copies in the Landau gauge. Within Gribov’s prescription to get rid of such remaining gauge copies, we explicitly derive the Gribov parameter dependence of the coupling constant and of the Lorentz violation aether term. The ultraviolet limit is investigated under

  • Time evolution of the quantized field coupled to a thermal bath: A phase space approach
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-13
    E.P. Mattos; A. Vidiella-Barranco

    We present an alternative method for describing the evolution of a mode of the quantized electromagnetic field in contact with a finite temperature thermal bath. We employ the expansion of the field density operator in terms of coherent states and the related Glauber–Sudarshan P-function in phase space. The method allows us to obtain analytical expressions of the system’s time-evolved P-function without

  • A study of anisotropic spheres in modified gravity via embedding approach
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-16
    Asifa Ashraf; Zhiyue Zhang; Allah Ditta; G. Mustafa

    The motivation of this paper is based on the foundation of extended teleparallel gravity with matter coupling to prospect the accelerated expansion of the Universe. This theory pivot on the torsion scalar along with the trace term on energy stress tensor. We manipulate the spherical symmetric metric and anisotropic fluid to discuss the study of stellar structures. To interpret our research, we used

  • Ground subspaces of topological phases of matter as error correcting codes
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-15
    Yang Qiu; Zhenghan Wang

    Topological quantum computing is believed to be inherently fault-tolerant. One mathematical justification would be to prove that ground subspaces or ground state manifolds of topological phases of matter behave as error correction codes with macroscopic distance. While this is widely assumed and used as a definition of topological phases of matter in the physics literature, besides the doubled abelian

  • Generation of multimode quantum correlation with energy-level cascaded four-wave mixing processes
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-15
    Jiawei Li; Wei Li; Mengqi Niu; Yixing Lin; Changbiao Li; Yin Cai; Yanpeng Zhang

    Multimode quantum correlation has important applications in the field of quantum information. In this paper, we propose a compact scheme to generate multiple quantum correlated beams based on energy-level cascaded four-wave mixing (EC-FWM) process in a single atomic medium of rubidium. Injecting two strong pump beams with different frequencies and one weak probe beam into one rubidium vapor, four possible

  • Coexistent physics and microstructure of the regular Bardeen black hole in anti-de Sitter spacetime
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-15
    Ahmed Rizwan C.L.; Naveena Kumara A.; Kartheek Hegde; Deepak Vaid

    We study the phase structure and the microscopic interactions in regular Bardeen AdS black hole. The stable and metastable phases in the black hole are analysed through coexistence and spinodal curves. The solutions are obtained numerically as the analytic solution to the coexistence curve is not feasible. The Pr−Tr coexistence equation is obtained using a fitting formula. The coexistence and spinodal

  • Study of thermal fluctuations in a charged rotating accelerating AdS black hole
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-08
    M. Sharif; Qanitah Ama-Tul-Mughani

    In this paper, we study the effects of thermal fluctuations on thermodynamics of charged rotating and accelerating anti-de Sitter black hole. We first derive exact expressions of thermodynamic quantities such as entropy, Hawking temperature and angular velocity for slowly accelerating black hole. We then compute Smarr–Gibbs–Dehum relation and thermodynamical volume in extended phase space. To discuss

  • Aharonov–Casher effect in the presence of spin-dependent potential
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-10
    K. Bakke; C. Furtado

    We study the quantum description of a neutral particle that has a permanent magnetic dipole moment that interacts with the Aharonov–Casher-type field configuration and a nonuniform magnetic field. From the interaction of the magnetic dipole moment with the magnetic field, an effective scalar potential arises in the Schrödinger–Pauli equation, which is characterized by being spin-dependent and proportional

  • Transforming kinks into compactons in the O(3)-sigma model
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-03
    F.C.E. Lima; D.A. Gomes; C.A.S. Almeida

    In this work, we investigate the solutions of vortices in the O(3)-sigma model with the gauge field governed by the Chern–Simons term and subject to a hyperbolic self-dual potential. We show that this model admits both topological and nontopological soliton solutions. Employing numerical analysis, we realize that the topological solutions of the model can be transformed into compacton-like solutions

  • Quantum field theory with the generalized uncertainty principle I: Scalar electrodynamics
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-08
    Pasquale Bosso; Saurya Das; Vasil Todorinov

    Recently, the authors presented a covariant extension of the Generalized Uncertainty Principle (GUP) with a Lorentz invariant minimum length. This opens the way for constructing and exploring the observable consequences of minimum length in Relativistic Quantum Field Theories. In particular, we compute quantum gravity corrections to high energy scattering experiments, which may provide the much needed

  • How efficient is transport of quantum cargo through multiple highways?
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-24
    Saptarshi Roy; Tamoghna Das; Debmalya Das; Aditi Sen(De); Ujjwal Sen

    Quantum states can be efficiently transferred over a long distance if the entire quantum channel can be divided into several small blocks. We consider a scenario in which each block consists of two copies of a multiparty state — one is used for distributing an arbitrary quantum state to multiple parties while the other channel is required to concentrate it back to a single party. Both in noiseless

  • Probing early universe with a generalized action
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-10
    Ranajit Mandal; Dalia Saha; Mohosin Alam; Abhik Kumar Sanyal

    Possibly, the most general action in the background of isotropic and homogeneous space–time has been considered to study the quantum evolution of the early universe, apart from a cosmological constant. The hermiticity of the effective Hamiltonian operator in the presence of curvature squared terms suggests unitary time evolution of the quantum states, assuring conservation of probability. The oscillatory

  • Regularity conditions for spherically symmetric solutions of Einstein-nonlinear electrodynamics equations
    Ann. Phys. (IF 2.083) Pub Date : 2020-10-10
    Alberto A. Garcia–Diaz; Gustavo Gutierrez–Cano

    In this report, the regularity conditions at the center for static spherically symmetric (SSS) solutions of the Einstein equations coupled to nonlinear electrodynamics (NLE) are established. The NLE is derived from a Lagrangian L=L(F) depending on the electromagnetic invariant F=FμνFμν∕4. The Einstein–NLE field equations for SSS metrics can be analyzed from the point of view of Euler equations; the

  • Renormalization in an interpolating gauge in Yang–Mills theory
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-30
    A. Andraši; J.C. Taylor

    The Coulomb gauge in QCD is the only explicitly unitary gauge. But it suffers from energy-divergences which means that it is not rigorously well-defined. One way to define it unambiguously is as the limit of a gauge interpolating between the Feynman gauge and the Coulomb gauge. This interpolating gauge is characterized by a parameter θ and the Coulomb gauge is obtained in the limit θ→0. We study the

  • On the four-body problem in the Born–Oppenheimer approximation
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-28
    C.A. Escobar; A. Martín-Ruiz

    The quantum problem of four particles in Rd (d≥3), with arbitrary masses m1,m2,m3 and m4, interacting through a harmonic oscillator potential is considered. This model allows exact solvability and a critical analysis of the Born–Oppenheimer approximation. The study is restricted to the ground state level. We pay special attention to the case of two equally heavy masses m1=m2=M and two light particles

  • Bicoherent-state path integral quantization of a non-hermitian hamiltonian
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-30
    F. Bagarello; Joshua Feinberg

    We introduce, for the first time, bicoherent-state path integration as a method for quantizing non-hermitian systems. Bicoherent-state path integrals arise as a natural generalization of ordinary coherent-state path integrals, familiar from hermitian quantum physics. We do all this by working out a concrete example, namely, computation of the propagator of a certain quasi-hermitian variant of Swanson’s

  • Mott transition in two-band fermion model with on-site Coulomb repulsion
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-25
    Igor N. Karnaukhov

    We provide analytical and numerical solutions of the two band fermion model with on-site Coulomb at half filling. In limiting cases for generate bands and one flat band, the model reduces to the Hubbard and Falicov–Kimball models, respectively. We have shown that the insulator state emerges at half filling due to hybridization of fermions of different bands with momenta k and k+π. Such hybridization

  • Dual fermion method as a prototype of generic reference-system approach for correlated fermions
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-25
    Sergey Brener; Evgeny A. Stepanov; Alexey N. Rubtsov; Mikhail I. Katsnelson; Alexander I. Lichtenstein

    We present a purely diagrammatic derivation of the dual fermion scheme (Rubtsov et al., 2008). The derivation makes particularly clear that a similar scheme can be developed for an arbitrary reference system provided it has the same interaction term as the original system. Thereby no restrictions are imposed by the locality of the reference problem or by the nature of the original problem as a lattice

  • Self-equilibration theorem in quantum-point contacts of interacting electrons: Time-dependent quantum fluctuations of tunnel transport beyond the Levitov–Lesovik scattering approach
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-01
    Gleb A. Skorobagatko

    Equilibration to the steady state for a wide class of Luttinger liquid ballistic weakly linked tunnel contacts is extensively studied. Quantum fluctuations of tunnel current are considered in all orders in tunnel coupling and out of the equilibrium in the time domain. Especially, two important mathematical statements: Self-equilibration (SE-)theorem and Self-equilibration (SE-)lemma on the exact re-exponentiation

  • Collinear configuration of the helium atom and two-electron ions
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-19
    Evgeny Z. Liverts; Rajmund Krivec; Nir Barnea

    Collinear configurations of the helium-like atomic systems, relevant, e.g., for the quasifree mechanism of the double photoionization of helium, are studied, parameterized by the single scalar parameter −1≤λ≤1 (“collinear parameter”) where λ=0 corresponds to the electron–nucleus (e −−n) coalescence and λ=1 corresponds to the electron–electron (e −−e) coalescence. In general, λ>0 corresponds to the

  • The modification of the Morse spectrum in the presence of the minimal length
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-23
    S. Miraboutalebi

    By incorporating a minimal viable length into the ordinary quantum mechanics, the usual Heisenberg uncertainty principle is modified into a generalized one. From the dimensional considerations, this minimal length can be of the order of the Planck scale of length. In this procedure, the momentum of the system is modified and the Hamiltonian obtains additional terms. By the assumption of the presence

  • Higher-form gauge symmetries in multipole topological phases
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-26
    Oleg Dubinkin; Alex Rasmussen; Taylor L. Hughes

    In this article we study field-theoretical aspects of multipolar topological insulators. Previous research has shown that such systems naturally couple to higher-rank tensor gauge fields that arise as a result of gauging dipole or subsystem U(1) symmetries. Here we propose a complementary framework using electric higher-form symmetries. We utilize the fact that gauging 1-form electric symmetries results

  • Standing wave solutions in Born–Infeld theory
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-07
    Nenad Manojlovic; Volker Perlick; Robertus Potting

    We study standing-wave solutions of Born–Infeld electrodynamics, with nonzero electromagnetic field in a region between two parallel conducting plates. We consider the simplest case which occurs when the vector potential describing the electromagnetic field has only one nonzero component depending on time and on the coordinate perpendicular to the plates. The problem then reduces to solving the scalar

  • Conformally symmetric traversable wormholes in f(R,T) gravity
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-06
    Ayan Banerjee; Ksh. Newton Singh; M.K. Jasim; Farook Rahaman

    To find more deliberate f(R,T) astrophysical solutions, we proceed by studying wormhole geometries under the assumption of spherical symmetry and the existence of a conformal Killing symmetry to attain the more acceptable astrophysical results. To do this, we consider a more plausible and simple model f(R,T)=R+2χT, where R is the Ricci scalar and T=−ρ+pr+2pt denotes the trace of the energy–momentum

  • Free fall in KvN mechanics and Einstein’s principle of equivalence
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-07
    Abhijit Sen; Shailesh Dhasmana; Zurab K. Silagadze

    The implementation of Einstein’s principle of equivalence in Koopman–von Neumann (KvN) mechanics is discussed. The implementation is very similar to the implementation of this principle in quantum mechanics. This is not surprising, because KvN mechanics provides a Hilbert space formulation of classical mechanics that is very similar to the quantum mechanical formalism. Both in KvN mechanics and quantum

  • Stability catalyzer for a relativistic non-topological soliton solution
    Ann. Phys. (IF 2.083) Pub Date : 2020-09-09
    M. Mohammadi

    For a real nonlinear Klein–Gordon Lagrangian density with a special solitary wave solution (SSWS), which is essentially unstable, it is shown how adding a proper additional massless term could guarantee the energetically stability of the SSWS, without changing its dominant dynamical equation and other properties. In other words, it is a stability catalyzer. The additional term contains a parameter

  • Generalized uncertainty principle corrections on atomic excitation
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-29
    Fidele J. Twagirayezu

    In this paper, we investigate the effect of minimal length on Einstein model of a gas of two-level atoms in thermal equilibrium with blackbody radiation at temperature T. We reformulate the classical Hamiltonian describing the interaction of atomic electrons with the electromagnetic field of blackbody radiation by employing Kempf Algebra to obtain the Hamiltonian with a minimal length. In the electric

  • Greybody factors of black holes in dRGT massive gravity coupled with nonlinear electrodynamics
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-28
    Sara Kanzi, S. Habib Mazharimousavi, İzzet Sakallı

    In the context of the dRGT massive gravity coupled with nonlinear electrodynamics, we present new dRGT black hole solutions. Together with the thermodynamical properties of the solutions, we study the greybody factor of the corresponding black hole solution. To this end, we compute the rigorous bound on the greybody factor for the obtained dRGT black holes. The obtained results are graphically represented

  • Statistical physics of flux-carrying Brownian particles
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-26
    Antonio A. Valido

    Chern–Simons gauge field theory has provided a natural framework to gain deep insight about many novel phenomena in two-dimensional condensed matter. We investigate the nonequilibrium thermodynamics properties of a (two-dimensional) dissipative harmonic particle when the Abelian topological gauge action and the (linear) Brownian motion dynamics are treated on an equal footing. We find out that the

  • Disordered crystals from first principles II: Transport coefficients
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-26
    Thomas D. Kühne, Julian Heske, Emil Prodan

    This is the second part of a project on the foundations of first-principle calculations of the electron transport in crystals at finite temperatures, aiming at a predictive first-principles platform that combines ab-initio molecular dynamics (AIMD) and a finite-temperature Kubo-formula with dissipation for thermally disordered crystalline phases. The latter are encoded in an ergodic dynamical system

  • The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-26
    K. Rezazadeh, S. Asadzadeh, K. Fahimi, K. Karami, A. Mehrabi

    We study the effect of varying sound speed on clustering dark energy in the Dirac–Born–Infeld (DBI) scenario. The DBI action is included in the class of k-essence models, and it has an important role in describing the effective degrees of freedom of D-branes in the string theory. In the DBI setup, we take the anti-de Sitter (AdS) warp factor f(ϕ)=f0ϕ−4, and investigate the self-interacting quartic

  • Balazs thought experiment and its implications for the electromagnetic force density in continuous media. Relativistic analysis
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-24
    Vadim A. Markel

    We analyze the Balazs thought experiment under minimal assumptions and show that the two expressions for the force density that have been recently discussed in the literature (the conventional Lorentz force density and the generalized or Einstein–Laub force density) are fully consistent with conservation of energy, conservation of momentum and the center-of-energy theorem. This conclusion contradicts

  • A three-step model of high harmonic generation using complex classical trajectories
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-21
    Werner Koch; David J. Tannor

    We present a new trajectory formulation of high harmonic generation that treats classically allowed and classically forbidden processes within a single dynamical framework. Complex trajectories orbit the nucleus, producing the stationary Coulomb ground state. When the field is turned on, these complex trajectories continue their motion in the field-dressed Coulomb potential and therefore tunnel ionization

  • Tensor network investigation of the double layer Kagome compound Ca10Cr7O28
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-21
    Augustine Kshetrimayum, Christian Balz, Bella Lake, Jens Eisert

    Quantum spin liquids are exotic quantum phases of matter that do not order even at zero temperature. While there are several toy models and simple Hamiltonians that could host a quantum spin liquid as their ground state, it is very rare to find actual, realistic materials that exhibit their properties. At the same time, the classical simulation of such instances of strongly correlated systems is intricate

  • Effective field theory for two-body systems with shallow S-wave resonances
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-20
    J. Balal Habashi, S. Fleming, S. Sen, U. van Kolck

    Resonances are of particular importance in the scattering of composite particles in quantum mechanics. We build an effective field theory for two-body scattering which includes a low-energy S-wave resonance. Our starting point is the most general Lagrangian with short-range interactions. We demonstrate that these interactions can be organized into various orders so as to generate a systematic expansion

  • Fermionic path integrals and correlation dynamics in a 1D XY system
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-19
    I. Lyris, P. Lykourgias, A.I. Karanikas

    We derive time dependent correlation functions in an one dimensional XY spin model with the use of generating functionals, the latter being defined as path integrals over fermionic coherent states. We focus on the proper construction of the aforementioned integrals in order to avoid the inconsistencies usually encountered in the literature. The static limit of our results successfully reproduces the

  • Nonequilibrium steady state and heat transport in nonlinear open quantum systems: Stochastic influence action and functional perturbative analysis
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-18
    Jing Yang, Jen-Tsung Hsiang, Andrew N. Jordan, B.L. Hu

    In this paper, we show that a nonequilibrium steady state (NESS) exists at late times in open quantum systems with weak nonlinearity by following its nonequilibrium dynamics with a perturbative analysis. We consider an oscillator chain containing three-types of anharmonicity: cubic α- and quartic β-type Fermi–Pasta–Ulam–Tsingou (FPUT) nearest-oscillator interactions and the on-site (pinned) Klein–Gordon

  • Nonlinear magnetically charged black holes in 4D Einstein–Gauss–Bonnet gravity
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-17
    Kimet Jusufi

    In this letter we present an exact spherically symmetric and magnetically charged black hole solution with exponential model of nonlinear electrodynamics (Kruglov, 2017) in the context of 4D Einstein–Gauss–Bonnet (EGB) gravity. We show that our −ve branch, in the limit of GB coupling coefficient α→0 and the nonlinear parameter β→0, reduces to the magnetically charged black hole of Einstein–Maxwell

  • Coherent states for graphene under the interaction of crossed electric and magnetic fields
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-17
    M. Castillo-Celeita, E. Díaz-Bautista, M. Oliva-Leyva

    We construct the coherent states for charge carriers in a graphene layer immersed in crossed external electric and magnetic fields. For that purpose, we solve the Dirac–Weyl equation in a Landau-like gauge avoiding applying techniques of special relativity, and thus we identify the appropriate raising and lowering operators associated to the system. We explicitly construct the coherent states as eigenstates

  • Four-dimensional reflection groups and electrostatics
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-17
    Maxim Olshanii, Yuri Styrkas, Dmitry Yampolsky, Vanja Dunjko, Steven G. Jackson

    We present a new class of electrostatics problems that are exactly solvable by adding finitely many image charges. Given a charge at some location inside a cavity bounded by up to four conducting grounded segments of spheres: if the spheres have a symmetry derived via a stereographic projection from a 4D finite reflection group, then this is a solvable generalization of the familiar problem of a charge

  • Modulated solitons, soliton and vortex clusters in purely nonlinear defocusing media
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-15
    Liangwei Zeng, Jianhua Zeng

    By means of standard Thomas–Fermi approximation, we present stable solutions of one- and two-dimensional (1D and 2D) multihump soliton structures, including 1D and 2D modulated solitons as well as 2D soliton clusters, supported by inhomogeneous defocusing nonlinear Kerr media. Such nonlinear settings may apply to nonlinear optics and Bose–Einstein condensates. All the 1D and 2D fundamental modes with

  • Quantum dynamics of scalar particles in the space–time of a cosmic string in the context of gravity’s rainbow
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-08
    L.C.N. Santos, C.E. Mota, C.C. Barros, L.B. Castro, V.B. Bezerra

    We analyze the dynamics of scalar particles in gravity’s rainbow considering the space–time of a cosmic string in this modified gravity. Thus, we solve the Klein–Gordon equation for two types of potential in which two possible rainbow functions are selected. In all cases studied we obtain exact solutions for the wave equation, derive the energy spectrum, analyze it in detail and discuss the dependence

  • Quark masses and mixings in minimally parameterized UV completions of the Standard Model
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-08
    Reinhard Alkofer, Astrid Eichhorn, Aaron Held, Carlos M. Nieto, Roberto Percacci, Markus Schröfl

    We explore a simple parameterization of new physics that results in an ultraviolet complete gauge-quark sector of the Standard Model. Specifically, we add an antiscreening contribution to the beta functions of the gauge couplings and a flavor-independent, antiscreening contribution to the beta functions of the Yukawa couplings. These two free parameters give rise to an intricate web of Renormalization

  • Maximally chaotic dynamical systems
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-07
    George Savvidy

    The interest in maximally chaotic dynamical systems is associated with the attempts to understand the relaxation phenomena, the foundation of the statistical mechanics, the appearance of turbulence in fluid dynamics, the non-linear dynamics of the Yang–Mills field, as well as the dynamical properties of gravitating N-body systems and the Black hole thermodynamics. In this respect of special interest

  • Energy of the Bose Laughlin quantum Hall state of few electrons at half filling of the lowest Landau level
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-05
    Orion Ciftja

    We report exact analytical results for the energy of the Bose Laughlin state of small systems of electrons at half filling factor of the lowest Landau level. The results apply to a disk geometry and the number of particles in the system consists of up to four electrons immersed in a neutralizing jellium background. Exact calculation of various forms of energy becomes feasible after one transforms all

  • Gaussian concentration bound and Ensemble equivalence in generic quantum many-body systems including long-range interactions
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-05
    Tomotaka Kuwahara, Keiji Saito

    This work explores fundamental statistical and thermodynamic properties of short-and long-range-interacting systems. The purpose of this study is twofold. Firstly, we rigorously prove that the probability distribution of arbitrary few-body observables is restricted by a Gaussian concentration bound (or Chernoff–Hoeffding inequality) above some threshold temperature. This bound is then derived for arbitrary

  • Non-Hermitian tuned topological band gap
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-05
    Bikashkali Midya

    Externally controllable band gap properties of a material is crucial in designing optoelectronic devices with desirable properties on-demand. Here, a possibility of single parameter tuning of trivial to non-trivial topological band gap by the introduction of linear gain in an otherwise trivial insulator is investigated. Gain is selectively injected into a one dimensional lattice of dimers such that

  • Topological effects of a spiral dislocation on quantum rings
    Ann. Phys. (IF 2.083) Pub Date : 2020-08-05
    W.C.F. da Silva, K. Bakke

    We consider an elastic medium with a spiral dislocation, and then, we investigate the topological effects of the spiral dislocation on the confinement of a quantum particle to a two-dimensional quantum ring and a one-dimensional quantum ring. We show that the topology of the spiral dislocation modifies the spectra of energy. In particular, we show that the Costa term is modified in the energy levels

  • Fundamental solutions of the Dirac operator in the Friedmann–Lemaître–Robertson–Walker spacetime
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-30
    Karen Yagdjian

    The equation of the spin-12 particles in the Friedmann–Lemaître–Robertson–Walker spacetime is investigated. The retarded and advanced fundamental solutions to the Dirac operator and generalized Dirac operator as well as the fundamental solutions to the Cauchy problem are written in explicit form via the fundamental solution of the wave equation in the Minkowski spacetime.

  • Joint effects of entanglement and symmetrization: Physical properties and exclusion
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-29
    Pedro Sancho

    Entanglement and symmetrization lead to non-separable states that can modify physical properties. Using the example of atomic absorption we compare both types of effects when they are relevant at once. The presence of multi-particle superpositions largely alters the absorption rates of identical atoms, even inhibiting the dependence on overlapping for fermions. We also identify a set of non-standard

  • Description of heterogeneous plasma microfield and optical properties of plasma by the QUIP model
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-28
    A.A. Belov, N.N. Kalitkin

    Optical properties of plasmas are determined by presence of fluctuating microscopic electric field. The present work provides thorough analysis of contemporary models and points out their shortcomings. To overcome the latter, we take the QUIP (QUasi-Independent Particles) model derived ab initio. We provide generalization of the model allowing to account for microfield heterogeneity up to octupole

  • Dynamics of one-dimensional correlated nuclear systems within non-equilibrium Green’s function theory
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-25
    Hao Lin, Hossein Mahzoon, Arnau Rios, Pawel Danielewicz

    Theory of non-equilibrium Green’s function (NGF) provides a practical framework for studying quantum many-body systems out of equilibrium. Extending the previous mean field approach developed for nuclear systems in one dimension with NGF, we introduce isospin degrees of freedom to the Green’s functions and incorporate short-range two-body interactions in the second-order self-consistent approximation

  • Darboux partners of Heun-class potentials for the two-dimensional massless Dirac equation
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-25
    Axel Schulze-Halberg, Artur M. Ishkhanyan

    We apply the Darboux transformation to construct new exactly-solvable cases of the two-dimensional massless Dirac equation for potential classes of Lambert-W and inverse exponential type. Both of these classes originate from the Heun equation. Conditions are devised for transformed potentials to be real-valued, and to be in terms of elementary functions.

  • Cosmic censorship conjecture in a general Kerr–Newman black hole
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-24
    H. Khodabakhshi, F. Shojai

    Using some probes, the violation of cosmic censorship conjecture in a general Kerr–Newman black hole is investigated. The result depends on many factors, like the relative sign of charge and rotation direction of the probe and black hole. Moreover the comparison of the angular momentum of the black hole and its charge has an impressive effect. Considering all these together, we have found the range

  • The geometry of induced electromagnetic fields in moving media
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-23
    C.S. Lopez-Monsalvo, D. Garcia-Pelaez, A. Rubio-Ponce, R. Escarela-Perez

    In this manuscript we provide a fully geometric formulation for the induced electromagnetic fields and their corresponding constitutive relations in moving media. To this end, we present the reader with a brief geometric summary to show how vector calculus electromagnetic theory is embedded in the more general language of differential forms. Then, we consider the class of metric constitutive relations

  • Accretion of perfect fluids onto a class of regular black holes
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-22
    Juliano C.S. Neves, Alberto Saa

    We consider the stationary spherical accretion process of perfect fluids onto a class of spherically symmetric regular black holes corresponding to quantum-corrected Schwarzschild spacetimes. We show that the accretion rates can differ from the Schwarzschild case, suggesting that the de Sitter core inside these regular black holes, which indeed precludes the central singularity, can act for some cases

  • Unitarity and symmetries of the multicomponent scattering matrix
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-18
    L. Diago-Cisneros, J.J. Flores-Godoy, G. Fernández-Anaya, H. Rodríguez-Coppola

    We present a theoretical procedure, which is fundamental for unitarity preservation in multicomponent–multiband systems, for a synchronous mixed-particle quantum transport. This study focuses the problem of (N×N) interacting components (with N≥2), in the framework of the envelope function approximation (EFA), and the standard unitary properties of the (N=1) scattering matrix are recovered. Rather arbitrary

  • Evolution of the charged dynamical radiating spherical structures
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-16
    Z. Yousaf, M.Z. Bhatti, T. Naseer

    In the scenario of f(R,T,Q) gravity, where R and T represent the Ricci scalar and the trace of stress energy tensor respectively, and Q≡RμνTμν, we generalize the concept of complexity for dissipative dynamical spherically self-gravitating fluid configuration proposed by Herrera et al. (2018). As the fluid contains dynamical situation, we evaluate the structural complexity as well as the complexity

  • Hawking temperature in dispersive media: Analytics and numerics
    Ann. Phys. (IF 2.083) Pub Date : 2020-07-16
    Alhan Moreno-Ruiz, David Bermudez

    One proposal of analog gravity is that the Hawking effect can be generalized to domains outside of astrophysics. So far, the sonic and the optical systems have been the most successful for this analogy. However, problems arise in analog systems when their dispersive effects are too large to be ignored, as this modifies the usual thermal spectrum of Hawking radiation. A linear approximation of the velocity

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