Current fluctuations in stochastically resetting particle systems

Abstract

We consider a system of non-interacting particles on a line with initial positions distributed uniformly with density $\rho$ on the negative half-line. We consider two different models: (i) each particle performs independent Brownian motion with stochastic resetting to its initial position with rate $r$ and (ii) each particle performs run and tumble motion, and with rate $r$ its position gets reset to its initial value and simultaneously its velocity gets randomised. We study the effects of resetting on the distribution $P(Q,t)$ of the integrated particle current $Q$ up to time $t$ through the origin (from left to right). We study both the annealed and the quenched current distributions and in both cases, we find that resetting induces a stationary limiting distribution of the current at long times. However, we show that the approach to the stationary state of the current distribution in the annealed and the quenched cases are drastically different for both models. In the annealed case, the whole distribution $P_{\mathrm{an}}(Q,t)$ approaches its stationary limit uniformly for all $Q$. In contrast, the quenched distribution $P_{\mathrm{qu}}(Q,t)$ attains its stationary form for $Q<Q_{\mathrm{crit}}(t)$, while it remains time-dependent for $Q>Q_{\mathrm{crit}}(t)$. We show that $Q_{\mathrm{crit}}(t)$ increases linearly with $t$ for large $t$. On the scale where $Q\sim Q_{\mathrm{crit}}(t)$, we show that $P_{\mathrm{qu}}(Q,t)$ has an unusual large deviation form with a rate function that has a third-order phase transition at the critical point. We have computed the associated rate functions analytically for both models. Using an importance sampling method that allows to probe probabilities as tiny as $10^{-14000}$, we were able to compute numerically this non-analytic rate function for the resetting Brownian dynamics and found excellent agreement with our analytical prediction.

arXiv comment26 pages, 6 figures

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• Large deviations of current for the symmetric simple exclusion process on a semi-infinite line, and on an infinite line with a slow bond
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• First-passage properties of the jump process with a drift. The general case
• Stationary state of harmonic chains driven by boundary resetting
• Current fluctuations in finite-sized one-dimensional non-interacting passive and active systems