Virial-like Thermodynamic Uncertainty Relation in the Tight-Binding Regime

TL;DR

This paper introduces a virial-like thermodynamic uncertainty relation for Brownian motion in tilted periodic potentials, providing a tighter entropy production approximation in the tight-binding regime and a validation rule based on drift and diffusion.

Contribution

It presents a novel virial-like expansion to improve entropy production bounds and a simple validation rule for the tight-binding regime in stochastic thermodynamics.

Findings

Derived a tighter lower bound on entropy production.

Provided a validation rule based on drift and diffusion.

Analyzed the approach's applicability outside the tight-binding regime.

Abstract

We presented a methodology to approximate the entropy production for Brownian motion in a tilted periodic potential. The approximation stems from the well known thermodynamic uncertainty relation. By applying a virial-like expansion, we provided a tighter lower limit solely in terms of the drift velocity and diffusion. The approach presented is systematically analysed in the tight-binding regime. We also provide a relatively simple rule to validate using the tight-binding approach based on drift and diffusion relations rather than energy barriers and forces. We also discuss the implications of our results outside the tight-binding regime.