English

Path Entropy Changes in Adiabatic Approximation

Statistical Mechanics 2012-09-26 v2

Abstract

By applying adiabatic theorem to a Markovian system, we calculate the adiabatic and diabatic entropy changes along a path. As well known, the total path entropy change is separated into two parts, system and environment entropy changes, ΔStot=ΔSsys+ΔSenv\Delta S_{tot} = \Delta S_{sys} + \Delta S_{env}. The environment entropy change, ΔSenv\Delta S_{env}, is divided again into two parts, an adiabatic contribution due to work, ΔSW\Delta S_{\mathcal{W}}, and a diabatic contributions due to heat, ΔSQ\Delta S_{\mathcal{Q}}. In an adiabatic process, total path entropy change is same with the adiabatic path entropy change, ΔSA\Delta S_{A}, which is given by sum of system entropy change and adiabatic contribution, ΔSA=ΔSsys+ΔSW\Delta S_{A} = \Delta S_{sys} + \Delta S_{\mathcal{W}}. Mathematical form of ΔSA\Delta S_{A} is a type of excess heat entropy change, but ΔSA\Delta S_{A} is due to work. By which, it is shown that the terms adiabatic and non-adiabatic contributions of ΔSna\Delta S_{na} and ΔSa\Delta S_{a} in [Phys. Rev. Lett. {\bf 104}, 090601 (2010)] should be completely switched, i.e.i.e. ΔSnaΔSA\Delta S_{na} \rightarrow \Delta S_{A} and ΔSaΔSQ\Delta S_{a} \rightarrow \Delta S_{\mathcal{Q}} in fact.

Keywords

Cite

@article{arxiv.1208.3948,
  title  = {Path Entropy Changes in Adiabatic Approximation},
  author = {Jang-il Sohn},
  journal= {arXiv preprint arXiv:1208.3948},
  year   = {2012}
}

Comments

4 pages, no figures

R2 v1 2026-06-21T21:52:51.602Z