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arXiv 2403.05945cond-mat.stat-mech
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分布式固定资源交换粒子:连接两个库的非对称排斥过程的相

Distributed fixed resources exchanging particles: Phases of an asymmetric exclusion process connected to two reservoirs

Sourav Pal, Parna Roy, Abhik Basu

AI总结:

本文提出一个由TASEP连接两个可交换粒子的固定资源库组成的一维模型,研究总资源量与动力学参数如何共同调控稳态密度、畴壁和库粒子数,并揭示其相图在资源充足时趋同于开放TASEP。

摘要:

我们提出并研究了一个概念性的一维模型,以探索固定资源与扩展系统不同部分之间粒子交换的共同相互作用如何影响连接系统不同部分的载流通道中的稳态密度。为此,我们考虑一个由完全非对称简单排斥过程(TASEP)连接两个粒子库组成的模型,这两个粒子库没有任何内部动力学,但可以直接在彼此之间交换粒子,从而确保稳态中存在非零电流。系统中定义可用“资源”的总粒子数虽然由模型动力学保持恒定,但可以取任意值,且独立于定义模型动力学的模型参数。我们展示了模型的相图如何由定义各种动力学更新规则的参数以及总可用资源共同控制。这些控制参数可以被调节,使TASEP通道上的密度全局均匀或分段连续并带有局域畴壁,同时也可以控制两个库的粒子数。一般来说,这些相图与开放边界的TASEP有很大不同。在大量资源的极限下,控制参数平面中的相图在拓扑上与开放TASEP的相图相同,并伴随畴壁的离域化。

英文摘要:

We propose and study a conceptual one-dimensional model to explore how the combined interplay between fixed resources and particle exchanges between different parts of an extended system can affect the stationary densities in a current carrying channel connecting different parts of the system. To this end, we consider a model composed of a totally asymmetric simple exclusion process (TASEP) connecting two particle reservoirs without any internal dynamics but which can directly exchange particles between each other, ensuring nonvanishing currents in the steady states. The total particle number in the system that defines the "resources" available, although is kept constant by the model dynamics, can take any value independent of the model parameters that define the dynamics of the model. We show how the resulting phase diagrams of the model are controlled by the parameters, which define the various dynamical update rules together with the total available resources. These control parameters can be tuned to make the density on the TASEP lane globally uniform or piecewise continuous with localized domain walls, and can also control populations of the two reservoirs. In general, the phase diagrams are quite different from a TASEP with open boundaries. In the limit of large amount of resources, the phase diagrams in the plane of the control parameters become topologically identical to that for an open TASEP together with delocalization of domain walls.

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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