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Information Thermodynamics: Maxwell's Demon in Nonequilibrium Dynamics

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arxiv 1111.5769 v2 pith:EGO4JNB2 submitted 2011-11-24 cond-mat.stat-mech

Takahiro Sagawa , Masahito Ueda This is my paper · ORCID
classification cond-mat.stat-mech
keywords thermodynamicsdemonmaxwellfeedbackinformationnonequilibriumreviewsystem
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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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