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In recent years, it has become increasingly popular to construct coarse-grained models with non-Markovian dynamics to account for an incomplete separation of time scales. One challenge of a systematic coarse-graining procedure is the…

软凝聚态物质 · 物理学 2017-09-25 Gerhard Jung , Martin Hanke , Friederike Schmid

We propose a generalized Langevin dynamics (GLD) technique to construct non-Markovian particle-based coarse-grained models from fine-grained reference simulations and to efficiently integrate them. The proposed GLD model has the form of a…

软凝聚态物质 · 物理学 2018-11-16 Gerhard Jung , Martin Hanke , Friederike Schmid

We present a numerical method to compute non-equilibrium memory kernels based on experimental data or molecular dynamics simulations. The procedure uses a recasting of the non-stationary generalized Langevin equation, in which we expand the…

统计力学 · 物理学 2019-05-29 Hugues Meyer , Philipp Pelagejcev , Tanja Schilling

We present a numerical method to produce stochastic dynamics according to the generalized Langevin equation with a non-stationary memory kernel. This type of dynamics occurs when a microscopic system with an explicitly time-dependent…

统计力学 · 物理学 2022-11-30 Christoph Widder , Fabian Glatzel , Tanja Schilling

The present work concerns the transferability of coarse-grained (CG) modeling in reproducing the dynamic properties of the reference atomistic systems across a range of parameters. In particular, we focus on implicit-solvent CG modeling of…

计算工程、金融与科学 · 计算机科学 2021-03-22 Zhan Ma , Shu Wang , Minhee Kim , Kaibo Liu , Chun-Long Chen , Wenxiao Pan

Modeling a high-dimensional Hamiltonian system in reduced dimensions with respect to coarse-grained (CG) variables can greatly reduce computational cost and enable efficient bottom-up prediction of main features of the system for many…

计算工程、金融与科学 · 计算机科学 2021-04-09 Shu Wang , Zhan Ma , Wenxiao Pan

The Generalized Langevin Equation (GLE) has been recently suggested to simulate the time evolution of classical solid and molecular systems when considering general non-equilibrium processes. In this approach, a part of the whole system (an…

统计力学 · 物理学 2014-04-23 L. Stella , C. D. Lorenz , L. Kantorovich

Recent pioneering experiments on non-Markovian dynamics done e.g. for active matter have demonstrated that our theoretical understanding of this challenging yet hot topic is rather incomplete and there is a wealth of phenomena still…

统计力学 · 物理学 2024-02-27 M. Wiśniewski , J. Łuczka , J. Spiechowicz

We study numerical methods for the generalized Langevin equation (GLE) with a positive Prony series memory kernel, in which case the GLE can be written in an extended variable Markovian formalism. We propose a new splitting method that is…

计算物理 · 物理学 2022-05-31 Manh Hong Duong , Xiaocheng Shang

Finding the dynamical law of observable quantities lies at the core of physics. Within the particular field of statistical mechanics, the generalized Langevin equation (GLE) comprises a general model for the evolution of observables…

We introduce a new method to accurately and efficiently estimate the effective dynamics of collective variables in molecular simulations. Such reduced dynamics play an essential role in the study of a broad class of processes, ranging from…

Generalized Langevin Equation (GLE) thermostats have been used very effectively as a tool to manipulate and optimize the sampling of thermodynamic ensembles and the associated static properties. Here we show that a similar, exquisite level…

化学物理 · 物理学 2017-09-06 Mariana Rossi , Venkat Kapil , Michele Ceriotti

The complexity of molecular dynamics simulations necessitates dimension reduction and coarse-graining techniques to enable tractable computation. The generalized Langevin equation (GLE) describes coarse-grained dynamics in reduced…

计算物理 · 物理学 2020-06-08 Francesca Grogan , Huan Lei , Xiantao Li , Nathan A. Baker

Analysis of non-Markovian systems and memory induced phenomena poses an everlasting challenge for physics. As a paradigmatic example we consider a classical Brownian particle of mass $M$ subjected to an external force and exposed to…

统计力学 · 物理学 2024-05-21 Mateusz Wiśniewski , Jerzy Łuczka , Jakub Spiechowicz

A recently proposed method for computer simulations in the isothermal-isobaric (NPT) ensemble, based on Langevin-type equations of motion for the particle coordinates and the ``piston'' degree of freedom, is re-derived by straightforward…

软凝聚态物质 · 物理学 2016-08-31 A. Kolb , B. Duenweg

Coarse-grained (CG) models are simplified representations of soft matter systems that are commonly employed to overcome size and time limitations in computational studies. Many approaches have been developed to construct and parametrise…

统计力学 · 物理学 2022-09-27 Piero Luchi , Roberto Menichetti , Gianluca Lattanzi , Raffaello Potestio

We study the design and implementation of numerical methods to solve the generalized Langevin equation (GLE) focusing on canonical sampling properties of numerical integrators. For this purpose, we cast the GLE in an extended phase space…

数值分析 · 数学 2020-12-09 Benedict Leimkuhler , Matthias Sachs

Fundamental understanding of complex dynamics in many-particle systems on the atomistic level is of utmost importance. Often the systems of interest are of macroscopic size but can be partitioned into few important degrees of freedom which…

化学物理 · 物理学 2015-07-09 Fabian Gottwald , Sven Karsten , Sergei D. Ivanov , Oliver Kühn

Memory effects are ubiquitous in a wide variety of complex physical phenomena, ranging from glassy dynamics and metamaterials to climate models. The Generalised Langevin Equation (GLE) provides a rigorous way to describe memory effects via…

无序系统与神经网络 · 物理学 2023-06-29 Max Kerr Winter , Ilian Pihlajamaa , Vincent E. Debets , Liesbeth M. C. Janssen

For a wide range of phenomena, current computational ability does not always allow for fully atomistic simulations of high-dimensional molecular systems to reach time scales of interest. Coarse-graining (CG) is an established approach to…

计算物理 · 物理学 2020-04-22 Joshua Finkelstein , Giacomo Fiorin , Benjamin Seibold
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