Thermodynamics of genuine non-equilibrium states under feedback control

Details Thermodynamics of genuine non-equilibrium states under feedback control Thermodynamics of genuine non-equilibrium states under feedback control

2011-09-27

arxiv.org/abs/1109.5892v2

Phys. Rev. Lett. 108, 030601 (2012)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.108.030601

For genuine non-equilibrium states that even at fixed external control parameter exhibit dissipation, we extend the Hatano-Sasa equality to processes with feedback control. The resulting bound on the maximal extractable work is substantially sharper than what would follow from applying the Sagawa-Ueda equality to transitions involving such states. For repeated measurements at short enough intervals, the power thus extracted can even exceed the average cost of driving as demonstrated explicitly with a simple, analytically solvable example.

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