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We use computer simulations to test a simple idea for mapping between long-time self diffusivities obtained from molecular and Brownian dynamics. The strategy we explore is motivated by the behavior of fluids comprising particles that…

软凝聚态物质 · 物理学 2011-10-25 Mark J. Pond , Jeffrey R. Errington , Thomas M. Truskett

We study the response of one dimensional diffusive systems, consisting of particles interacting via symmetric or asymmetric exclusion, to time-periodic driving from two reservoirs coupled to the ends. The dynamical response of the system…

统计力学 · 物理学 2011-03-23 Urna Basu , Debasish Chaudhuri , P. K. Mohanty

We employ renewal processes to characterize the spatiotemporal dynamics of an active Brownian particle under stochastic orientational resetting. By computing the experimentally accessible intermediate scattering function (ISF) and…

软凝聚态物质 · 物理学 2024-05-14 Yanis Baouche , Thomas Franosch , Matthias Meiners , Christina Kurzthaler

Brownian particles in random potentials show an extended regime of subdiffusive dynamics at intermediate times. The asymptotic diffusive behavior is often established at very long times and thus cannot be accessed in experiments or…

软凝聚态物质 · 物理学 2014-05-22 Richard D. L. Hanes , Michael Schmiedeberg , Stefan U. Egelhaaf

We look at the equilibrium of a Brownian particle in an inhomogeneous space following the alternative approach proposed in ref.[1]. We consider a coordinate dependent damping that makes the stochastic dynamics the one with multiplicative…

统计力学 · 物理学 2014-10-07 Avik Biswas , A. Bhattacharyay

The non-Markovian dynamics of a charged particle linearly coupled to a neutral bosonic heat bath is investigated in an external uniform magnetic field. The analytical expressions for the time-dependent and asymptotic friction and diffusion…

量子物理 · 物理学 2019-01-16 I. B. Abdurakhmanov , Z. Kanokov , G. G. Adamian , N. V. Antonenko

We present a diagrammatic formulation of a theory for the time dependence of density fluctuations in equilibrium systems of interacting Brownian particles. To facilitate derivation of the diagrammatic expansion we introduce a basis that…

软凝聚态物质 · 物理学 2009-11-13 Grzegorz Szamel

We treat a relativistically moving particle interacting with a quantum field from an open system viewpoint of quantum field theory by the method of influence functionals or closed-time-path coarse-grained effective actions. The particle…

量子物理 · 物理学 2007-05-23 Philip R. Johnson , B. L. Hu

A micron-sized droplet of bromine water immersed in a surfactant-laden oil phase can swim (S. Thutupalli, R. Seemann, S. Herminghaus, New J. Phys. 13 073021 (2011)). The bromine reacts with the surfactant at the droplet interface and…

软凝聚态物质 · 物理学 2016-08-25 Maximilian Schmitt , Holger Stark

We describe a two-dimensional model for active particles whose self-propulsion speed is not fixed, but varies in time, and whose motion is subject to both translational and rotational diffusion. In the conventional treatment of active…

软凝聚态物质 · 物理学 2025-10-01 Tayeb Jamali

The dynamics of a classical heavy particle moving in a quantum environment is determined by a Langevin equation which encapsulates the effect of the environment-induced reaction forces on the particle. For an open quantum system these…

介观与纳米尺度物理 · 物理学 2015-12-09 Mark Thomas , Torsten Karzig , Silvia Viola Kusminskiy

We study a Langevin equation describing the stochastic motion of a particle in one dimension with coordinate $x$, which is simultaneously exposed to a space-dependent friction coefficient $\gamma(x)$, a confining potential $U(x)$ and…

软凝聚态物质 · 物理学 2021-05-12 Davide Breoni , Hartmut Löwen , Ralf Blossey

In ABP systems, phase separation is accompanied by the emergence of vapor bubbles within liquid domains. Using large-scale particle-based simulations, we study the stochastic dynamics of these bubbles and find that most nucleate, grow, and…

软凝聚态物质 · 物理学 2025-01-22 Mingqi Yan , Erwin Frey , Marcus Müller , Stefan Klumpp

We investigate a stochastic version of a simple enzymatic reaction which follows the generic Michaelis-Menten kinetics. At sufficiently high concentrations of reacting species, the molecular fluctuations can be approximated as a realization…

种群与进化 · 定量生物学 2009-11-13 A. Fiasconaro , A. Ochab-Marcinek , B. Spagnolo , E. Gudowska-Nowak

An angular time-dependent probability density function describing Brownian or anomalous rotational dynamics of fixed-length atom-to-atom vectors is presented. The probability density function, which fully incorporates angular boundary…

其他凝聚态物理 · 物理学 2023-03-07 David A. Faux , Örs Istók , Arifah A. Rahaman , Peter J. McDonald , Eoin McKiernan , Dermot F. Brougham

In this work, we study the dynamics of a single active Brownian particle, as well as the collective behavior of interacting active Brownian particles, in a fluctuating heterogeneous environment. We employ a variant of the diffusing…

软凝聚态物质 · 物理学 2022-01-05 S. M. J. Khadem , N. H. Siboni , S. H. L. Klapp

We continue our study of the linear response of a nonequilibrium system. This Part II concentrates on models of open and driven inertial dynamics but the structure and the interpretation of the result remain unchanged: the response can be…

统计力学 · 物理学 2010-05-02 Marco Baiesi , Eliran Boksenbojm , Christian Maes , Bram Wynants

As an extension of the isotropic setting presented in the companion paper [J. Phys. A 52, 144002 (2019)], we consider the Langevin dynamics of a many-body system of pairwise interacting particles in $d$ dimensions, submitted to an external…

无序系统与神经网络 · 物理学 2019-07-23 Elisabeth Agoritsas , Thibaud Maimbourg , Francesco Zamponi

Recently, the Brownian dynamics of self-propelled (active) rod-like particles was explored to model the motion of colloidal microswimmers, catalytically-driven nanorods, and bacteria. Here, we generalize this description to biaxial…

软凝聚态物质 · 物理学 2014-01-28 Raphael Wittkowski , Hartmut Löwen

Fusion-fission dynamics is investigated with a special emphasis on fusion reactions at low energy for which shell effects and pairing correlations can play a crucial role leading in particular to multi-modal fission. To follow the dynamical…

核理论 · 物理学 2007-05-23 Ch. Schmitt , J. Bartel , K. Pomorski , A. Surowiec