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arXiv 0902.3555cond-mat.stat-mech
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关于驱动扩散势与定态分布之间的非平衡关系

On the nonequilibrium relation between potential and stationary distribution for driven diffusion

Christian Maes, Karel Netocny, Bidzina M. Shergelashvili

摘要:

本文研究了非平衡过阻尼扩散过程中外加势与相应定态占位之间的关系。这种关系通常成为长期导致全球变化的相对密度时,潜在的局部扰动,相反,我们发现,需要完全重新安排的潜力,以创造一个局部变化的密度。直接的问题,即确定密度作为势的函数,属于非平衡响应理论。在动力学涨落的研究中,自然会出现确定产生给定平稳分布的势的逆问题。这种联系的波动理论的结果在一个固定的密度在一个给定的潜在的变分表征,反之亦然。

英文摘要:

We investigate the relation between an applied potential and the corresponding stationary state occupation for nonequilibrium and overdamped diffusion processes. This relation typically becomes long ranged resulting in global changes for the relative density when the potential is locally perturbed, and inversely, we find that the potential needs to be wholly rearranged for the purpose of creating a locally changed density. The direct question, determining the density as a function of the potential, comes under the response theory out of equilibrium. The inverse problem of determining the potential that produces a given stationary distribution naturally arises in the study of dynamical fluctuations. This link to the fluctuation theory results in a variational characterization of the stationary density upon a given potential and vice versa.

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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