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arXiv math/0512394math.PRcond-mat.stat-mech
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相互作用粒子系统中经验流的大偏差

Large deviations of the empirical current in interacting particle systems

L. Bertini, A. De Sole, D. Gabrielli, G. Jona-Lasinio, C. Landim

摘要:

我们研究了晶格气体中流体动力学标度极限下的电流涨落。更准确地说,我们证明了在对称简单排它过程中经验流的一个大偏差原理。然后,我们估计的平均电流的波动在一个大的时间间隔的渐近概率,并表明,相应的速率函数可以通过解决一个变分问题的功能I。对于对称的简单排它过程,极小元是与时间无关的,因此这个变分问题可以化为与时间无关的问题。另一方面,对于其他模型,极小值是不定常的。这种现象自然被解释为动力学相变。

英文摘要:

We study current fluctuations in lattice gases in the hydrodynamic scaling limit. More precisely, we prove a large deviation principle for the empirical current in the symmetric simple exclusion process with rate functional I. We then estimate the asymptotic probability of a fluctuation of the average current over a large time interval and show that the corresponding rate function can be obtained by solving a variational problem for the functional I. For the symmetric simple exclusion process the minimizer is time independent so that this variational problem can be reduced to a time independent one. On the other hand, for other models the minimizer is time dependent. This phenomenon is naturally interpreted as a dynamical phase transition.

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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