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Phys. Rev. Lett. 88, 050602 (2002)

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Quantum Afterburner: Improving the Efficiency of an Ideal Heat Engine

Marlan O. Scully

Department of Physics and Institute for Quantum Studies, Texas A&M University, Texas 77843
Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany

(Received 7 February 2001; revised 20 November 2001; published 23 January 2002)

By using a laser and maser in tandem, it is possible to obtain laser action in the hot exhaust gases of a heat engine. Such a "quantum afterburner" involves the internal quantum states of the working molecules as well as the techniques of cavity quantum electrodynamics and is therefore in the domain of quantum thermodynamics. It is shown that Otto cycle engine performance can be improved beyond that of the "ideal" Otto heat engine. Furthermore, the present work demonstrates a new kind of lasing without initial inversion. ©2002 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v88/e050602
DOI: 10.1103/PhysRevLett.88.050602
PACS: 05.10.Gg, 05.40.-a, 42.50.-p        Additional Information

References

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11. We assume that the temperature T₃ is low enough that p = 0.
    
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