# Activity induced first order transition for the current in a disordered medium

## TL;DR

This paper introduces a model where increasing activity in a disordered medium can revive particle current that is otherwise suppressed at high external fields, highlighting a novel activity-induced phase transition.

## Contribution

It proposes a new theoretical framework showing how activity can induce a first-order transition in current within disordered systems, linking stochastic resonance to particle mobility.

## Key findings

- Current dies at high external fields but is revived with increased activity
- Particles can overcome barriers via a stochastic resonance-like mechanism
- Discussion on the role of shaking in relaxation processes

## Abstract

It is well known that particles can get trapped by randomly placed obstacles when they are pushed too much. We present a model where the current in a disordered medium dies at a large external field, but is reborn when the activity is increased. By activity we mean the time-variation of the external driving at a constant time-averaged field. A different interpretation of the resurgence of the current is that the particles are capable of taking an infinite sequence of potential barriers via a mechanism similar to stochastic resonance. We add a discussion regarding the role of "shaking" in processes of relaxation.