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arXiv 1608.03264cond-mat.stat-mech
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条件随机游动与相互作用驱动凝聚

Conditioned random walks and interaction-driven condensation

Juraj Szavits-Nossan, Martin R. Evans, Satya N. Majumdar

摘要:

我们考虑离散时间连续空间随机游动的约束下,返回到原点(当地时间)和总面积下的步行是固定的。我们首先计算具有区域$a$并且在时间$τ$之后第一次返回原点的偏移的联合概率。然后,我们展示了如何冷凝时发生的总面积约束增加:一个包含有限部分的区域出现的偏移。最后,我们将展示如何概括的现象以前研究的情况下,由几个约束引起的冷凝,以及它是如何与相互作用驱动的冷凝,使我们能够解释的现象在大偏差理论的框架。

英文摘要:

We consider a discrete-time continuous-space random walk under the constraints that the number of returns to the origin (local time) and the total area under the walk are fixed. We first compute the joint probability of an excursion having area $a$ and returning to the origin for the first time after time $τ$. We then show how condensation occurs when the total area constraint is increased: an excursion containing a finite fraction of the area emerges. Finally we show how the phenomena generalises previously studied cases of condensation induced by several constraints and how it is related to interaction-driven condensation which allows us to explain the phenomenon in the framework of large deviation theory.

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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