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arXiv 0905.4897cond-mat.stat-mech
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半马氏过程的动力学涨落

Dynamical fluctuations for semi-Markov processes

Christian Maes, Karel Netočný, Bram Wynants

摘要:

我们发展了一个关于非平衡半马尔可夫过程的Onsager-Machlup型理论。我们的主要结果是一个确切的大时间渐近的占领时间和电流的联合概率系统中,建立一些通用的大偏差结构。我们详细讨论了非平衡驱动和非指数等待时间分布如何影响占用电流统计。马尔可夫条件的违反反映在波动中出现了一种新的非局部性。给出了环上驱动随机游动的一些例子的显式解。

英文摘要:

We develop an Onsager-Machlup-type theory for nonequilibrium semi-Markov processes. Our main result is an exact large time asymptotics for the joint probability of the occupation times and the currents in the system, establishing some generic large deviation structures. We discuss in detail how the nonequilibrium driving and the non-exponential waiting time distribution influence the occupation-current statistics. The violation of the Markov condition is reflected in the emergence of a new type of nonlocality in the fluctuations. Explicit solutions are obtained for some examples of driven random walks on the ring.

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