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We study the dynamics of long-wavelength fluctuations in one-dimensional (1D) many-particle systems as described by self-consistent mode-coupling theory. The corresponding nonlinear integro-differential equations for the relevant…

统计力学 · 物理学 2015-06-25 Luca Delfini , Stefano Lepri , Roberto Livi , Antonio Politi

Dynamic heterogeneity, believed to be one of the hallmarks of the dynamics of supercooled liquids, is expected to affect the diffusion of the particles comprising the liquid. We have carried out extensive molecular dynamics simulations of…

软凝聚态物质 · 物理学 2019-12-23 Rajsekhar Das , Chandan Dasgupta , Smarajit Karmakar

Strong anomalous diffusion is {often} characterized by a piecewise-linear spectrum of the moments of displacement. The spectrum is characterized by slopes $\xi$ and $\zeta$ for small and large moments, respectively, and by the critical…

Anomalous KPZ spin transport is well established in integrable non-Abelian lattice models but has not been investigated in continuum field theories as discretization in numerics generally break the continuum theory's integrability. We show…

统计力学 · 物理学 2026-01-28 Matija Koterle , Tomaz Prosen , Tianci Zhou

Diffusion occurs in numerous physical systems throughout nature, drawing its generality from the universality of the central limit theorem. Around a century ago it was realized that an extension to this type of dynamics can be obtained in…

统计力学 · 物理学 2023-10-04 Gadi Afek , Nir Davidson , David A. Kessler , Eli Barkai

We propose diffusion-like equations with time and space fractional derivatives of the distributed order for the kinetic description of anomalous diffusion and relaxation phenomena, whose diffusion exponent varies with time and which,…

统计力学 · 物理学 2009-11-07 A. V. Chechkin , R. Gorenflo , I. M. Sokolov

We argue that a proposed exponent identity [Phys. Rev. Lett 85, 1238 (2000)] for interface roughening in spontaneous imbibition is wrong. It rests on the assumption that the fluctuations are controlled by a single time scale, but liquid…

软凝聚态物质 · 物理学 2009-11-07 M. Dube , M. Rost , K. R. Elder , M. Alava , S. Majaniemi , T. Ala-Nissila

This article is devoted to the detection of parameters in anomalous diffusion from a single passive measurement. More precisely, we consider the simultaneous identification of coefficients as well as a time-dependent source term appearing…

偏微分方程分析 · 数学 2026-03-10 Maolin Deng , Ali Feizmohammadi , Bangti Jin , Yavar Kian

Under low-Reynolds-number conditions, dynamics of convection and diffusion are usually considered separately because their dominant spatial and temporal scales are different, but cooperative effects of convection and diffusion can cause…

流体动力学 · 物理学 2022-08-04 Yuki Koyano , Hiroyuki Kitahata

Consider a chaotic dynamical system generating Brownian motion-like diffusion. Consider a second, non-chaotic system in which all particles localize. Let a particle experience a random combination of both systems by sampling between them in…

混沌动力学 · 物理学 2019-05-01 Y. Sato , R. Klages

We present analytical results for the biased diffusion of particles moving under a constant force in a randomly layered medium. The influence of this medium on the particle dynamics is modeled by a piecewise constant random force. The…

统计力学 · 物理学 2010-02-10 S. I. Denisov , H. Kantz

We consider the coagulation dynamics A+A -> A and the annihilation dynamics A+A -> 0 for particles moving subdiffusively in one dimension, both on a lattice and in a continuum. The analysis combines the "anomalous kinetics" and "anomalous…

统计力学 · 物理学 2007-05-23 S. B. Yuste , Katja Lindenberg

In their comment to the paper ``Theory of the evaporation/condensation transition of equilibrium droplets in finite volumes'' [Physica A, 319, 99 (2003)], Biskup et al. claim that in finite systems at fixed density ``the physical…

统计力学 · 物理学 2007-05-23 K. Binder

The stranglehold of low temperatures on fascinating quantum phenomena in one-dimensional quantum magnets has been challenged recently by the discovery of anomalous spin transport at high temperatures. Whereas both regimes have been…

强关联电子 · 物理学 2021-09-01 Maxime Dupont , Nicholas E. Sherman , Joel E. Moore

We present a rigorous study of quantum diffusion of a relativistic particle subjected to a time-dependent random potential with $\delta$ correlation in time. We find that in the asymptotic time limit the particle wave packet spreads…

无序系统与神经网络 · 物理学 2015-09-28 Reza Sepehrinia

We demonstrate that light is subject to anomalous (i.e., negative) diffraction when propagating in the presence of hyperbolic dispersion. We show that light propagation in hyperbolic media resembles the dynamics of a quantum particle of…

We present technical results required for the description and understanding of correlations and fluctuations of the empirical density and current as well as diverse time-integrated and time-averaged thermodynamic currents of diffusion…

统计力学 · 物理学 2023-01-09 Cai Dieball , Aljaž Godec

Systems of particles interacting via inverse-power law potentials have an invariance with respect to changes in length and temperature, implying a correspondence in the dynamics and thermodynamics between different `isomorphic' sets of…

统计力学 · 物理学 2016-08-03 Thibaud Maimbourg , Jorge Kurchan

We show analytically that there is anomalous diffusion when the diffusion constant depends on the concentration as a power law with a positive exponent or a negative exponent with absolute value less than one and the initial condition is a…

统计力学 · 物理学 2019-12-13 Alex Hansen , Eirik G. Flekkøy

We propose two nonlinear random walk models which are suitable for the analysis of both chemotaxis and anomalous transport. We derive the balance equations for the population density for the case when the transition rate for a random walk…

统计力学 · 物理学 2010-10-22 Sergei Fedotov
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