Emergence of dynamic phases in the presence of different kinds of open boundaries in stochastic transport with short-range interactions

Nagel, Hannes; Janke, Wolfhard

doi:10.1088/1742-5468/2016/01/013207

Cited by 1 publication

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“…In this model, the stationary state factorizes over lattice bonds instead of sites as for the ZRP, which is why it is often referred to as the pair-factorized steady states (PFSS) model, mainly to distinguish from the fully factorized steady state of the ZRP. Many stationary properties of the condensed state in this family of models such as the condensate's shape and length scale [22][23][24], mobility [25,26], metastability of the condensate [27] or boundary induced phase separation [28][29][30] were studied.…”

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confidence: 99%

Dynamics of condensate formation in stochastic transport with pair-factorized steady states: Nucleation and coarsening time scales

Nagel

Janke

2016

Phys. Rev. E

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Driven diffusive systems such as the zero-range process (ZRP) and the pair-factorized steady states (PFSS) stochastic transport process are versatile tools that lend themselves to the study of transport phenomena on a generic level. While their mathematical structure is simple enough to allow significant analytical treatment, they offer a variety of interesting phenomena. With appropriate dynamics, the ZRP and PFSS models feature a condensation transition where, for a supercritical density, the translational symmetry breaks spontaneously and excess particles form a single-site or spatially extended condensate, respectively. In this paper we numerically study the typical time scales of the two stages of this condensation process: Nucleation and coarsening. Nucleation is the first stage of condensation where the bulk system relaxes to its stationary distribution and droplet nuclei form in the system. These droplets then gradually grow or evaporate in the coarsening regime to coalesce in a single condensate when the system finally relaxes to the stationary state. We use the ZRP condensation model to discuss the choice of the estimation method for the nucleation time scale and present scaling exponents for the ZRP and PFSS condensation models with respect to the choice of the typical droplet nuclei mass. We then proceed to present scaling exponents in the coarsening regime of the ZRP for partially asymmetric dynamics and the PFSS model for symmetric and asymmetric dynamics.

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