A new mechanism of hypersensitive transport in tilted sharp ratchets induced by noise flatness

TL;DR

This paper investigates how noise flatness influences hypersensitive transport in tilted ratchets, revealing non-monotonic effects and optimal noise parameters that maximize particle mobility.

Contribution

It introduces a new mechanism showing how noise flatness induces hypersensitive transport in tilted ratchets with multiplicative noise.

Findings

Mobility enhancement is highly sensitive to small tilting forces at low temperatures.

Optimal noise parameters exist that maximize particle mobility.

Mobility depends non-monotonically on noise flatness and correlation time.

Abstract

The noise-flatness-induced hypersensitive transport of overdamped Brownian particles in a tilted ratchet system driven by multiplicative nonequilibrium three-level Markovian noise and additive white noise is considered. At low temperatures the enhancement of current is very sensitive to the applied small static tilting force. It is established that the enhancement of mobility depends non-monotonically on the parameters (flatness, correlation time) of multiplicative noise. The optimal values of noise parameters maximizing the mobility are found.