Thermodynamic reversibility in feedback processes
Departamento de Física Atómica, Molecular y Nuclear and GISC, Universidad Complutense de Madrid, 28040 Madrid, Spain, EU
Accepted: 18 May 2011
The sum of the average work dissipated plus the information gained during a thermodynamic process with discrete feedback must exceed zero. We demonstrate that the minimum value of zero is attained only by feedback-reversible processes that are indistinguishable from their time-reversal, thereby extending the notion of thermodynamic reversibility to feedback processes. In addition, we prove that in every realization of a feedback-reversible process the sum of the work dissipated and change in uncertainty is zero.
PACS: 05.70.-a – Thermodynamics / 05.20.-y – Classical statistical mechanics / 89.70.-a – Information and communication theory
© EPLA, 2011