Nonequilibrium Langevin dynamics: A demonstration study of shear flow fluctuations in a simple fluid
文献类型：期刊论文
| 作者 | Belousov, R (reprint author), Rockefeller Univ, New York, NY 10065 USA.; Rondoni, L; Cohen, EGD; Belousov, R |
| 刊名 | PHYSICAL REVIEW E
 |
| 出版日期 | 2017 |
| 卷号 | 96期号:2页码:22125 |
| DOI | http://dx.doi.org/10.1103/PhysRevE.96.022125 |
| 英文摘要 | The present paper is based on a recent success of the second-order stochastic fluctuation theory in describing time autocorrelations of equilibrium and nonequilibrium physical systems. In particular, it was shown to yield values of the related deterministic parameters of the Langevin equation for a Couette flow in a microscopic molecular dynamics model of a simple fluid. In this paper we find all the remaining constants of the stochastic dynamics, which then is simulated numerically and compared directly with the original physical system. By using these data, we study in detail the accuracy and precision of a second-order Langevin model for nonequilibrium physical systems theoretically and computationally. We find an intriguing relation between an applied external force and cumulants of the resulting flow fluctuations. This is characterized by a linear dependence of an athermal cumulant ratio, an apposite quantity introduced here. In addition, we discuss how the order of a given Langevin dynamics can be raised systematically by introducing colored noise. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21990]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Belousov, R (reprint author), Rockefeller Univ, New York, NY 10065 USA. |
| 推荐引用方式 GB/T 7714 | Belousov, R ,Rondoni, L,Cohen, EGD,et al. Nonequilibrium Langevin dynamics: A demonstration study of shear flow fluctuations in a simple fluid[J]. PHYSICAL REVIEW E,2017,96(2):22125. |
| APA | Belousov, R ,Rondoni, L,Cohen, EGD,&Belousov, R.(2017).Nonequilibrium Langevin dynamics: A demonstration study of shear flow fluctuations in a simple fluid.PHYSICAL REVIEW E,96(2),22125. |
| MLA | Belousov, R ,et al."Nonequilibrium Langevin dynamics: A demonstration study of shear flow fluctuations in a simple fluid".PHYSICAL REVIEW E 96.2(2017):22125. |
入库方式： OAI收割
来源：理论物理研究所
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