Information Thermodynamics: Maxwell's Demon in Nonequilibrium Dynamics
Takahiro Sagawa, Masahito Ueda
TL;DR
This paper reviews the theory of information thermodynamics, focusing on how measurement and feedback influence nonequilibrium thermodynamics and the extension of the second law, with examples and experimental insights.
Contribution
It introduces an extended framework of thermodynamics incorporating feedback control effects, including recent experimental realizations of Maxwell's demon.
Findings
Extended second law for feedback-controlled systems
Maximum work extraction limits with feedback
Experimental demonstration of Maxwell's demon
Abstract
We review theory of information thermodynamics which incorporates effects of measurement and feedback into nonequilibrium thermodynamics of a small system, and discuss how the second law of thermodynamics should be extended for such situations. We address the issue of the maximum work that can be extracted from the system in the presence of a feedback controller (Maxwell's demon) and provide a few illustrative examples. We also review a recent experiment that realized a Maxwell's demon based on a feedback-controlled ratchet.
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Taxonomy
TopicsAdvanced Thermodynamics and Statistical Mechanics · Quantum Mechanics and Applications · Quantum Computing Algorithms and Architecture