Symmetric exclusion processes on a ring with moving defects

TL;DR

This paper investigates how moving defects affect particle transport and spatial structure in symmetric exclusion processes on a ring, revealing collective effects and connections with sequential update models.

Contribution

It introduces a generalized SSEP model with moving defects and explores their impact on system behavior, extending previous models.

Findings

Moving defects alter local hopping rates and induce collective effects.

The model reveals new spatial and transport phenomena due to defect motion.

Connections established between moving defect models and sequential update schemes.

Abstract

We study symmetric simple exclusion processes (SSEP) on a ring in the presence of uniformly moving multiple defects or disorders - a generalization of the model proposed earlier [Phys. Rev. E 89, 022138 (2014)]. The defects move with uniform velocity and change the particle hopping rates locally. We explore the collective effects of the defects on the spatial structure and transport properties of the system. We also introduce an SSEP with ordered sequential (sitewise) update and elucidate the close connection with our model.