English

A family of thermodynamic uncertainty relations valid for general fluctuation theorems

Statistical Mechanics 2026-03-24 v2 Quantum Physics

Abstract

Thermodynamic Uncertainty Relations (TURs) are relations that establish lower bounds for the relative fluctuations of thermodynamic quantities in terms of the statistics of the associated entropy production. In this work we derive a family of TURs that explores higher order moments of the entropy production and is valid in any situation a Fluctuation Theorem holds. The resulting bound holds in both classical and quantum regimes and can always be saturated. These TURs are shown in action for a two level system weakly coupled to a bath undergoing a non time-symmetric drive, where we can use the Tasaki-Crooks fluctuation theorem. Finally, we draw a connection between our TURs and the existence of correlations between the entropy production and the thermodynamic quantity under consideration.

Keywords

Cite

@article{arxiv.2407.10390,
  title  = {A family of thermodynamic uncertainty relations valid for general fluctuation theorems},
  author = {André M. Timpanaro},
  journal= {arXiv preprint arXiv:2407.10390},
  year   = {2026}
}

Comments

v2: 12 pages, 5 graphs (in 2 figures) - Updated version, with expanded appendices that cover some technical aspects of the bounds. The figures were also changed in order to be color-blind friendly. Final version submitted to Physical Review E