Three and four current reversals versus temperature in correlation ratchets with a simple sawtooh potential

TL;DR

This paper investigates how Brownian particles in a sawtooth potential exhibit multiple current reversals driven by temperature changes under combined thermal and nonequilibrium noise, revealing new reversal phenomena.

Contribution

It introduces the discovery of three and four current reversals in correlation ratchets with a simple sawtooth potential as a function of temperature, along with conditions for their existence.

Findings

Identification of three and four current reversals with temperature

Parameter space analysis of fixed points related to reversals

Conditions for the occurrence of novel current reversals

Abstract

Transport of Brownian particles on a simple sawtooth potential subjected to both unbiased thermal and nonequilibrium symmetric three-level Markovian noise is considered. The new effects of three and four current reversals as a function of temperature are established in such correlation ratchets. The parameter space coordinates of the fixed points associated with these current reversals and the necessary and sufficient conditions for the existence of the novel current reversals are found.