Year: 2010
Type: article
Abstract: The Jarzynski equality is generalized to situations in which nonequilibrium systems are subject to a feedback control. The new terms that arise as a consequence of the feedback describe the mutual information content obtained by measurement and the efficacy of the feedback control. Our results lead to a generalized fluctuation-dissipation theorem that reflects the readout information, and they can be experimentally tested using small thermodynamic systems. We illustrate our general results by introducing an "information ratchet", which can transport a Brownian particle in one direction and extract positive work from the particle.
Source: Physical Review Letters
Authors: Takahiro Sagawa, Masahito Ueda
Institutions: The University of Tokyo, Japan Science and Technology Agency
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2156375046