# Generalized Jarzynski equality under nonequilibrium feedback control.

@article{Sagawa2009GeneralizedJE, title={Generalized Jarzynski equality under nonequilibrium feedback control.}, author={Takahiro Sagawa and Masahito Ueda}, journal={Physical review letters}, year={2009}, 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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