Designing optimal discrete-feedback thermodynamic engines

Designing optimal discrete-feedback thermodynamic engines 

Jordan M. Horowitz and Juan M. R. Parrondo Departamento de F´ısica At´omica, Molecular y Nuclear and GISC, Universidad Complutense de Madrid, 28040 Madrid, Spain, EU E-mail: parrondo@fis.ucm.es 

Abstract.

 Feedback can be utilized to convert information into useful work, making it an effective tool for increasing the performance of thermodynamic engines. Using feedback reversibility as a guiding principle, we devise a method for designing optimal feedback protocols for thermodynamic engines that extract all the information gained during feedback as work. Our method is based on the observation that in a feedbackreversible process the measurement and the time-reversal of the ensuing protocol both prepare the system in the same probabilistic state. We illustrate the utility of our method with two examples of the multi-particle Szilard engine. PACS numbers: 05.70.-a, 05.20.-y, 89.70.-a


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http://arxiv.org/pdf/1110.6808.pdf