Low temperature ratchet current

TL;DR

This paper derives an explicit formula for low temperature ratchet current in multilevel systems and analyzes its behavior as the number of states approaches infinity.

Contribution

It provides a new explicit expression for the ratchet current and investigates its asymptotic behavior in large systems.

Findings

Explicit formula for ratchet current at low temperature

Asymptotic analysis as number of states increases

Numerical values illustrating the behavior

Abstract

In [3], the low temperature ratchet current in a multilevel system is considered. In this note, we give an explicit expression for it and find its numerical value as the number of states goes to infinity.