Generalized Jarzynski Equality under Nonequilibrium Feedback Control

被引：387

作者：

Sagawa, Takahiro ^{[1
]}

Ueda, Masahito ^{[1
,2
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1138654, Japan

[2] JST, ERATO Macroscop Quantum Control Project, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 09期

关键词：

FREE-ENERGY DIFFERENCES; FLUCTUATION THEOREM; ENTROPY PRODUCTION; 2ND LAW; THERMODYNAMICS; INFORMATION; VIOLATIONS; SYSTEMS;

D O I：

10.1103/PhysRevLett.104.090602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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