期刊
PHYSICAL REVIEW LETTERS
卷 104, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.090602
关键词
-
资金
- MEXT, Japan. [17071005]
- JSPS [208038]
- Grants-in-Aid for Scientific Research [17071005] Funding Source: KAKEN
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.
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