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相关论文: The Berk-Breizman Model as a Paradigm for Energeti…

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Using hybrid-kinetic particle-in-cell simulation, we study the evolution of an expanding, collisionless, magnetized plasma in which strong Alfv\'enic turbulence is persistently driven. Temperature anisotropy generated adiabatically by the…

高能天体物理现象 · 物理学 2021-12-08 A. F. A. Bott , L. Arzamasskiy , M. W. Kunz , E. Quataert , J. Squire

Axisymmetric ($m=0$) gyrokinetic and extended-MHD simulations of sheared-flow Z-pinch plasma are performed with the high-order finite volume code COGENT. The present gyrokinetic model solves the long-wavelength limit of the gyrokinetic…

等离子体物理 · 物理学 2020-11-06 V. I. Geyko , J. R. Angus , M. A. Dorf

The dynamics of fermionic many-body systems is investigated in the framework of Boltzmann-Langevin (BL) stochastic one-body approaches. Within the recently introduced BLOB model, we examine the interplay between mean-field effects and…

核理论 · 物理学 2017-11-27 P. Napolitani , M. Colonna

We study a many-body system of interacting fermionic atoms of two species that are in thermodynamic equilibrium with their condensed heteronuclear bound states (molecules). In order to describe such an equilibrium state, we use a…

量子气体 · 物理学 2017-06-30 A. S. Peletminskii , S. V. Peletminskii , Yu. V. Slyusarenko

In this work we numerically investigate the fate of the Bardeen-Cooper-Schrieffer (BCS) pairing in the presence of quenched phase under Peierls substitution using time-dependent real space and momentum space Bogoliubov-de Gennes equation…

量子气体 · 物理学 2019-02-06 Beibing Huang , Xiaosen Yang , Ning Xu , Jing Zhou , Ming Gong

A fast and efficient numerical-analytical approach is proposed for description of complex behavior in non-equilibrium ensembles in the BBGKY framework. We construct the multiscale representation for hierarchy of partition functions by means…

等离子体物理 · 物理学 2017-03-29 Antonina N. Fedorova , Michael G. Zeitlin

Interacting one-dimensional quantum systems play a pivotal role in physics. Exact solutions can be obtained for the homogeneous case using the Bethe ansatz and bosonisation techniques. However, these approaches are not applicable when…

量子物理 · 物理学 2016-07-12 M. E. S. Andersen , A. S. Dehkharghani , A. G. Volosniev , E. J. Lindgren , N. T. Zinner

We investigate formation of Bose-Einstein condensates under non-equilibrium conditions using numerical simulations of the three-dimensional Gross-Pitaevskii equation. For this, we set initial random weakly nonlinear excitations and the…

量子气体 · 物理学 2022-03-23 Vishwanath Shukla , Sergey Nazarenko

Electron temperature anisotropies and electron beams are nonthermal features of the observed nonequilibrium electron velocity distributions in the solar wind. In collision-poor plasmas these nonequilibrium distributions are expected to be…

空间物理 · 物理学 2020-10-21 Heyu Sun , Jinsong Zhao , Wen Liu , Huasheng Xie , Dejin Wu

We present a general framework in which we can accurately describe the non-equilibrium dynamics of trapped atomic gases. This is achieved by deriving a single Fokker-Planck equation for the gas. In this way we are able to discuss not only…

统计力学 · 物理学 2007-05-23 H. T. C. Stoof

Topological gauge theories describe the low-energy properties of certain strongly correlated quantum systems through effective weakly interacting models. A prime example is the Chern-Simons theory of fractional quantum Hall states, where…

In this paper, we explore the embedding of nonlinear dynamical systems into linear ordinary differential equations (ODEs) via the Carleman linearization method. Under dissipative conditions, numerous previous works have established rigorous…

量子物理 · 物理学 2025-02-03 Hsuan-Cheng Wu , Jingyao Wang , Xiantao Li

We investigate the dynamics of an effectively one-dimensional Bose-Einstein condensate (BEC) with scattering length $a$ subjected to a spatially periodic modulation, $a=a(x)=a(x+L)$. This "collisionally inhomogeneous" BEC is described by a…

斑图形成与孤子 · 物理学 2009-11-11 Mason A. Porter , P. G. Kevrekidis , Boris A. Malomed , D. J. Frantzeskakis

We apply the concepts of nonlinear guided-wave optics to a Bose-Einstein condensate (BEC) trapped in an external potential. As an example, we consider a parabolic double-well potential and derive coupled-mode equations for the complex…

凝聚态物理 · 物理学 2009-10-31 Elena A. Ostrovskaya , Yuri S. Kivshar , Mietek Lisak , Bjorn Hall , Federica Cattani , Dan Anderson

The paper discusses the problem of stability of a two-component plasma and proposes a consistent consideration of quantum and long-range effects to calculate the thermodynamic properties of such a plasma. We restrict ourselves by the case…

等离子体物理 · 物理学 2023-09-28 G. S. Demyanov , P. R. Levashov

We have extended our study of the competition between the drive and stabilization of plasma microinstabilities by sheared flow to include electromagnetic effects at low plasma $\beta$ (the ratio of plasma to magnetic pressure). The extended…

等离子体物理 · 物理学 2015-06-16 M. D. J. Cole , S. L. Newton , S. C. Cowley , N. F. Loureiro , D. Dickinson , C. Roach , J. W. Connor

In this paper we derive three new asymptotic models for an hyperbolic-hyperbolicelliptic system of PDEs describing the motion of a collision-free plasma in a magnetic field. The first of these models takes the form of a non-linear and…

偏微分方程分析 · 数学 2026-04-22 Diego Alonso-Orán , Ángel Durán , Rafael Granero-Belinchón

We describe the interaction of parallel-propagating Alfv\'en waves with ion-acoustic waves and other Alfv\'en waves, in magnetized, high-$\beta$ collisionless plasmas. This is accomplished through a combination of analytical theory and…

高能天体物理现象 · 物理学 2023-12-15 Stephen Majeski , Matthew W. Kunz

We theoretically investigate the thermodynamic stability of a normal-state Bose-Fermi mixture, with a tunable Bose-Fermi pairing interaction $-U_{\rm BF}<0$ associated with a hetero-nuclear Feshbach resonance, as well as a weak repulsive…

量子气体 · 物理学 2021-06-30 Koki Manabe , Yoji Ohashi

We study the instability of a ring Bose-Einstein condensate under a periodic modulation of inter-atomic interactions. The condensate exhibits temporal and spatial patterns induced by the parametric resonance, which can be characterized by…

量子气体 · 物理学 2019-02-20 Chen-Xi Zhu , Wei Yi , Guang-Can Guo , Zheng-Wei Zhou