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自适应重置扩散中的定域-离域转变

Localization Delocalization Transition in Diffusion with Adaptive Resetting

Tommer D. Keidar, Shlomi Reuveni

arXiv 2608.27090首次发表:更新:

AI 中文总结

本文针对重置率依赖位置的自适应扩散,确定了λ=-2为临界阈值,发现平方反比重置对应平衡态对数势,存在温度依赖幂律尾部的离域转变,明确了空间依赖型重置的定域条件。

AI 中文摘要

随机重置可使扩散定域并产生非平衡稳态,但空间依赖型重置产生定域的条件仍不明确。本文建立了自适应重置下扩散的通用分类方法,其中重置率r(x)依赖于位置。对于渐近标度r(x)~|x|^λ的重置率,确定了λ=-2为临界阈值:当λ>-2时,稳态为定域态且呈现 stretched-exponential(拉伸指数)尾部;当λ<-2时,重置渐近过弱无法使粒子定域。在临界标度r(x)~|x|^{-2}时,出现全新的定性区域:稳态呈现幂律尾部,其指数依赖于温度,并表现出有限温度下的离域转变。因此,平方反比重置在非平衡体系中起到了平衡态下对数势的作用,建立了与平衡态中温度驱动离域相对应的非平衡对应关系。

英文摘要

Stochastic resetting can localize diffusion and generate nonequilibrium steady states, but the conditions under which spatially dependent resetting produces localization remain unclear. Here, we establish a general classification for diffusion under adaptive resetting, where the resetting rate $r(x)$ depends on position. For rates with the asymptotic scaling $r(x)\sim |x|^λ$, we identify a sharp threshold at $λ=-2$. For $λ>-2$, the steady state is localized and exhibits stretched-exponential tails, whereas for $λ<-2$, resetting is asymptotically too weak to localize the particle. Precisely at the marginal scaling $r(x)\sim |x|^{-2}$, a qualitatively new regime emerges: the steady state develops power-law tails with a temperature-dependent exponent and exhibits a finite-temperature delocalization transition. Thus, inverse-square resetting plays the role of the logarithmic potential in equilibrium, establishing a nonequilibrium counterpart of the temperature-driven delocalization seen there.

论文原文

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