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arXiv 0912.0694cond-mat.stat-mech
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马尔可夫动力学的非平衡线性响应,II:惯性动力学

Nonequilibrium Linear Response for Markov Dynamics, II: Inertial Dynamics

Marco Baiesi, Eliran Boksenbojm, Christian Maes, Bram Wynants

摘要:

我们继续研究非平衡系统的线性响应。这第二部分集中在开放和驱动惯性动力学模型,但结构和解释的结果保持不变:响应可以表示为未扰动系统中的两个时间相关性的总和,一个熵,其他狂热。分解产生于非平衡作用量水平上的时间反演下的(反)对称性。响应公式涉及到一个统计平均超过明确已知的观测,但在平衡的情况下,它们取决于模型动态的动力学活动过剩。作为一个例子,迁移率和扩散常数之间的爱因斯坦关系被修改的位置和粒子的动量之间的相关项。

英文摘要:

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 expressed as a sum of two temporal correlations in the unperturbed system, one entropic, the other frenetic. The decomposition arises from the (anti)symmetry under time-reversal on the level of the nonequilibrium action. The response formula involves a statistical averaging over explicitly known observables but, in contrast with the equilibrium situation, they depend on the model dynamics in terms of an excess in dynamical activity. As an example, the Einstein relation between mobility and diffusion constant is modified by a correlation term between the position and the momentum of the particle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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