Current fluctuations in a partially asymmetric simple exclusion process with a defect particle

Ivan Lobaskin*, Martin R Evans, Kirone Mallick

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We study an exclusion process on a ring comprising a free defect particle in a bath of normal particles. The model is one of the few integrable cases in which the bath particles are partially asymmetric. The presence of the free defect creates localized or shock phases according to parameter values. We use a functional approach to Bethe equations resulting from a nested Bethe ansatz to calculate exactly the mean currents and diffusion constants. The results agree very well with Monte-Carlo simulations and reveal the main modes of fluctuation in the different phases of the steady state.
Original languageEnglish
Article number024127
Pages (from-to)1-15
Number of pages15
JournalPhysical Review E
Volume109
Issue number2
DOIs
Publication statusPublished - 23 Feb 2024

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