Generalized Jarzynski equality under nonequilibrium feedback control.

@article{Sagawa2010GeneralizedJE,
  title={Generalized Jarzynski equality under nonequilibrium feedback control.},
  author={Takahiro Sagawa and Masahito Ueda},
  journal={Physical review letters},
  year={2010},
  volume={104 9},
  pages={
          090602
        }
}
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… 

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