Extracting work from a single heat bath through feedback
Extracting work from a single heat bath through feedback
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DOI：
10.1209/0295-5075/94/10001
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发表时间：
2011-04-01
期刊：
影响因子：
1.8
通讯作者：
Seifert, U.
中科院分区：
文献类型：
--
作者：
Abreu, D.;Seifert, U.
如果有其他信息，可以从单个热浴中提取功。对于典型的情况下，布朗粒子的谐波电位，其位置已被测量的有限精度，我们确定的最佳协议操纵的中心和刚度的潜力，以最大限度地提高这项工作在一个有限的时间过程。这项工作所施加的广义第二定律不等式涉及信息的约束，可以达到只有当位置和刚度的潜在的控制和过程是准静态的。根据我们的分析结果，对这种周期性运行的“信息机器”所提供的功率进行了估计。版权所有（C）EPLA，2011
Work can be extracted from a single heat bath if additional information is available. For the paradigmatic case of a Brownian particle in a harmonic potential, whose position has been measured with finite precision, we determine the optimal protocol for manipulating the center and stiffness of the potential in order to maximize this work in a finite-time process. The bound on this work imposed by a generalized-second-law inequality involving information can be reached only if both position and stiffness of the potential are controlled and the process is quasistatic. Estimates on the power delivered by such an "information machine" operating cyclically follow from our analytical results. Copyright (C) EPLA, 2011