Extraction of work from a single thermal bath in the quantum regime

@article{Allahverdyan2000ExtractionOW,
  title={Extraction of work from a single thermal bath in the quantum regime},
  author={Allahverdyan and Nieuwenhuizen},
  journal={Physical review letters},
  year={2000},
  volume={85 9},
  pages={
          1799-802
        }
}
The stationary state of a quantum particle strongly coupled to a quantum thermal bath is known to be non-Gibbsian, due to entanglement with the bath. For harmonic potentials, where the system can be described by effective temperatures, thermodynamic relations are shown to take a generalized Gibbsian form that may violate the Clausius inequality. For the weakly anharmonic case, a Fokker-Planck-type description is constructed. It is shown that then work can be extracted from the bath by cyclic… 
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