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arXiv 2103.08853cond-mat.stat-mech
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资源受限双通道上的排斥过程:对称破缺与激波动力学

Exclusion Process on two intersected lanes with constrained resources: Symmetry breaking and shock dynamics

Akriti Jindal, Arvind Kumar Gupta

摘要:

本文研究了一类特殊拓扑网络上的排它过程,该网络具有两个双通道,竞争有限容量库中的粒子。为了提供一个理论基础,我们利用平均场近似与畴壁理论。系统的稳态性质,包括相变,密度分布和畴壁的位置解析推导。在相似的动力学规则下,两个通道的粒子仅在非对称点处相互作用。保持系统的对称性,直到粒子数不超过站点总数。然而,除此之外,对称性破缺现象发生,导致不对称相的出现,并且即使对于无限数量的颗粒也继续存在。相图的复杂性显示了一个非单调的行为与系统中的粒子数的增加。体诱导激波出现在对称相,而边界诱导激波则出现在对称相和非对称相。通过对激波位置随粒子进入量的增加而变化的监测,我们解释了可能的相变。理论结果得到了广泛的蒙特卡罗模拟的支持,并解释使用简单的物理参数。

英文摘要:

We present a study of exclusion process on a peculiar topology of network with two intersected lanes, competing for the particles in a reservoir with finite capacity. To provide a theoretical ground for our findings, we exploit mean-field approximation along with domain-wall theory. The stationary properties of the system including phase transitions, density profiles and position of the domain-wall are derived analytically. Under the similar dynamical rules, the particles of both the lanes interact only at the intersected site. The symmetry of system is maintained till number of particles do not exceed total number of sites. However, beyond this the symmetry breaking phenomenon occurs resulting in the appearance of asymmetric phases and continues to persist even for infnite number of particles. The complexity of phase diagram shows a non-monotonic behaviour with increasing number of particles in the system. A bulk induced shock appears in a symmetric phase, whereas, a boundary induced shock is observed in symmetric as well as asymmetric phase. Monitoring the location of shock with increasing entry of particles, we explain the possible phase transitions. The theoretical results are supported by extensive Monte Carlo simulations and explained using simple physical arguments.

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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