Cluster-factorized steady states in finite range processes

Abstract

We study a class of nonequilibrium lattice models on a ring where particles hop in a particular direction, from a site to one of its (say, right) nearest neighbours, with a rate that depends on the occupation of all the neighbouring sites within a range R. This finite range process (FRP) for R=0 reduces to the well known zero-range process (ZRP), giving rise to a factorized steady state (FSS) for any arbitrary hop rate. We show that, provided the hop rates satisfy a specific condition, the steady state of FRP can be written as a product of cluster-weight function of (R+1) occupation variables. We show that, for a large class of cluster-weight functions, the cluster-factorized steady state admits a finite dimensional transfer-matrix formulation, which helps in calculating the spatial correlation functions and subsystem mass distributions exactly. We also discuss a criterion for which the FRP undergoes a condensation transition.

11 pages, 3 eps figures

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Cited by in corpus (5)

• Exact gap statistics for the random average process on a ring with a tracer
• Zero range and finite range processes with asymmetric rate functions
• Matrix Product States for Interacting Particles without Hardcore Constraints
• Reentrant condensation transition in a two species driven diffusive system
• Particle hopping on a ladder: exact solution using multibalance