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Materials with spin-momentum locked surface or interface states provide an interesting playground for studying physics and application of charge-spin current conversion. To characterize their non-equilibrium magnetic and transport…

介观与纳米尺度物理 · 物理学 2020-08-26 Ping Tang , Xiufeng Han , Shufeng Zhang

We present a non-isothermal mesoscopic model for investigation of the phase transition dynamics of thermoresponsive polymers. Since this model conserves energy in the simulations, it is able to correctly capture not only the transient…

化学物理 · 物理学 2015-04-28 Zhen Li , Yu-Hang Tang , Xuejin Li , George Em Karniadakis

The mean first-passage time (MFPT) is one standard measure for the reaction time in thermally activated barrier-crossing processes. While the relationship between MFPTs and phenomenological rate coefficients is known for systems that…

统计力学 · 物理学 2024-03-12 Qingyuan Zhou , Roland R. Netz , Benjamin A. Dalton

We analyze the nonequilibrium dynamics of single inextensible semiflexible biopolymers as stretching forces are applied at the ends. Based on different (contradicting) heuristic arguments, various scaling laws have been proposed for the…

软凝聚态物质 · 物理学 2007-09-17 B. Obermayer , O. Hallatschek , E. Frey , K. Kroy

We describe and implement a technique for extracting forces from the relaxation of an overdamped thermal system with normal modes. At sufficiently short time intervals, the evolution of a normal mode is well described by a one-dimensional…

软凝聚态物质 · 物理学 2009-11-13 Sunil K. Sainis , Vincent Germain , Eric R. Dufresne

We present embedding procedures for the non-Markovian stochastic Schr\"{o}dinger equations, arising from studies of quantum systems coupled with bath environments. By introducing auxiliary wave functions, it is demonstrated that the…

计算物理 · 物理学 2020-05-04 Xiantao Li

Dynamics of a discrete polymer in time-dependent external potentials is studied with the master equation approach. We consider both stochastic and deterministic switching mechanisms for the potential states and give the essential equations…

统计力学 · 物理学 2008-06-25 Janne Kauttonen , Juha Merikoski , Otto Pulkkinen

This letter presents a kinetic closure of the filtered Boltzmann--BGK equation, paving the way toward an alternative description of turbulence. The closure retains the turbulent subfilter stress tensor without a separate Smagorinsky-type…

流体动力学 · 物理学 2026-05-20 Francesco Marson , Orestis Malaspinas

In this study we investigate the statistics of two-dimensional stationary turbulence using a Markovian forcing scheme, which correlates the forcing process in the current time step to the previous time step according to a defined memory…

流体动力学 · 物理学 2012-12-06 Omer San , Anne E. Staples

In a fully-controllable experiment platform for studying non-Markovian open quantum dynamics, we show that the non-Markovianity could be investigated from the global and local aspects. By mixing random unitary dynamics, we demonstrate…

量子物理 · 物理学 2022-08-12 Xin-Yu Chen , Na-Na Zhang , Wan-Ting He , Xiang-Yu Kong , Ming-Jie Tao , Fu-Guo Deng , Qing Ai , Gui-Lu Long

The linear viscoelastic response of single semiflexible polymer chains in the infinite-dilution limit is studied using Brownian dynamics simulations of coarse-grained bead-spring chains. The springs obey the FENE-Fraenkel force law, a…

软凝聚态物质 · 物理学 2026-03-03 Amit Varakhedkar , P. Sunthar , J. Ravi Prakash

We provide a quantitative description of the evolution of memory from the apparently random Markovian dynamics of a pair of optically trapped colloidal microparticles in water. The particles are trapped in very close proximity of each other…

软凝聚态物质 · 物理学 2018-08-15 Shuvojit Paul , Randhir Kumar , Ayan Banerjee

We evaluate the spin squeezing dynamics of N independent spin-1/2 particles with exchange symmetry. Each spin interacts with its own reservoir, and the reservoirs are independently and identical. The spin squeezing parameter is analytically…

量子物理 · 物理学 2013-04-17 Peng Xue

In this study we formulate a theoretical approach, based on a Boltzmann-like kinetic equation, to describe pattern formation in two-dimensional mixtures of microtubular filaments and molecular motors. Following the previous work by Aranson…

软凝聚态物质 · 物理学 2018-02-28 Ivan Maryshev , Davide Marenduzzo , Andrew B. Goryachev , Alexander Morozov

One important problem in constructing the reduced dynamics of molecular systems is the accurate modeling of the non-Markovian behavior arising from the dynamics of unresolved variables. The main complication emerges from the lack of scale…

计算物理 · 物理学 2023-02-01 Zhiyuan She , Pei Ge , Huan Lei

We study the rotational dynamics of a flexible polymer initially wrapped around a rigid rod and unwinding from it. This dynamics is of interest in several problems in biology and constitutes a fundamental instance of polymer relaxation from…

软凝聚态物质 · 物理学 2014-07-29 Jean-Charles Walter , Marco Baiesi , Enrico Carlon , Helmut Schiessel

The synchronized molecular dynamics simulation via macroscopic heat and momentum transfer is proposed for the non-isothermal flow behaviors of complex fluids. In this method, the molecular dynamics simulations are assigned to small fluid…

软凝聚态物质 · 物理学 2014-10-29 Shugo Yasuda , Ryoichi Yamamoto

I present an approach to calculate the finite-frequency quantum noise in systems strongly coupled to structured reservoirs based on the Markovian embedding. This technique consists of mapping of the non-Markovian dynamics of the original…

介观与纳米尺度物理 · 物理学 2020-12-04 Krzysztof Ptaszynski

For boundary-driven non-equilibrium Markov models of non-interacting particles in one dimension, either in continuous space with the Fokker-Planck dynamics involving an arbitrary force $F(x)$ and an arbitrary diffusion coefficient $D(x)$,…

统计力学 · 物理学 2023-07-06 Cecile Monthus

We present a theoretical argument to derive a scaling law between the mean translocation time $\tau$ and the chain length $N$ for driven polymer translocation. This scaling law explicitly takes into account the pore-polymer interactions,…

软凝聚态物质 · 物理学 2013-10-29 Timo Ikonen , Aniket Bhattacharya , Tapio Ala-Nissila , Wokyung Sung