A dynamical transition and metastability in a size-dependent zero-range process

A dynamical transition and metastability in a size-dependent zero-range process
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尺寸相关零范围过程中的动态转变和亚稳态

DOI:
10.1088/1751-8113/48/5/055001
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发表时间:
2015
期刊:
Mathematical and Theoretical
影响因子:
--
通讯作者:
Chleboun P
Chleboun P
中科院分区:
--
文献类型:
--
作者:
Chleboun P

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我们研究了具有与系统尺寸相关的跳跃率的零范围过程,已知该过程表现出不连续的凝结转变。亚稳态均质相和凝聚相共存于转变周围的扩展相区域中,这在系综的等价和非等价背景下得到了充分的表征。在本文中,我们报告了关于大偏差特性和决定系统亚稳态动力学的自由能景观的严格结果。在凝聚相区域内,我们确定了一条新的动态转变线,它将凝聚态的两种不同的运动机制分开,并提供了所有相关时间尺度的完整讨论。我们的结果与最近对凝聚粒子系统亚稳态动力学的兴趣直接相关,并适用于更一般的凝聚粒子系统,该系统将动态转变表现为有限尺寸效应。
We study a zero-range process with system-size dependent jump rates, which is known to exhibit a discontinuous condensation transition. Metastable homogeneous phases and condensed phases co-exist in extended phase regions around the transition, which have been fully characterized in the context of the equivalence and non-equivalence of ensembles. In this paper we report rigorous results on the large deviation properties and the free energy landscape which determine the metastable dynamics of the system. Within the condensed phase region we identify a new dynamic transition line which separates two distinct mechanisms of motion of the condensate, and provide a complete discussion of all relevant timescales. Our results are directly related to recent interest in metastable dynamics of condensing particle systems and apply to more general condensing particle systems, which exhibit the dynamical transition as a finite size effect.
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