Martingale properties of entropy production and a generalized work theorem with decoupled forward and backward processes
Statistical Mechanics
2025-04-17 v2 Mathematical Physics
math.MP
Probability
Abstract
By decoupling forward and backward stochastic trajectories, we construct a family of martingales and work theorems for both overdamped and underdamped Langevin dynamics. Our results are made possible by an alternative derivation of work theorems that uses tools from stochastic calculus instead of path-integration. We further strengthen the equality in work theorems by evaluating expectations conditioned on an arbitrary initial state value. These generalizations extend the applicability of work theorems and offer new interpretations of entropy production in stochastic systems. Lastly, we discuss the violation of work theorems in far-from-equilibrium systems.
Keywords
Cite
@article{arxiv.2411.08311,
title = {Martingale properties of entropy production and a generalized work theorem with decoupled forward and backward processes},
author = {Xiangting Li and Tom Chou},
journal= {arXiv preprint arXiv:2411.08311},
year = {2025}
}