ETH Polymer Physics seminar


2013-02-13
10:15 at HCI J 574

Models of quantum engines and refrigerators

Robert Alicki

GdaƄsk University, Institute of Theoretical Physics and Astrophysics, Poland

The recently developed technique combining the weak coupling limit with the Floquet formalism for quantum open systems is outlined and the obtained Markovian master equations are shown to be consistent with thermodynamics. The theory is illustrated by examples of quantum heat engines and refrigerators, in particular by a model of two-level atom driven by a strong laser field and weakly coupled to heat baths. The case of two thermal reservoirs: an electromagnetic one at finite temperature and the second dephasing one, which can be realized as a phononic or buffer gas reservoir is studied in details. This system can work in two regimes depending on the detuning sign: a heat pump transporting heat from the dephasing reservoir to an electromagnetic bath or can heat both, always at the expense of work supplied by the laser field.


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