%0 Generic %1 gelbwaserklimovsky2014power %A Gelbwaser-Klimovsky, David %A Niedenzu, Wolfgang %A Brumer, Paul %A Kurizki, Gershon %D 2014 %K engines heat %T Power enhancement of heat engines via correlated thermalization in multilevel systems %U http://arxiv.org/abs/1411.1388 %X We analyze a heat machine based on a periodically-driven quantum system permanently coupled to hot and cold baths. It is shown that the maximal power output of a degenerate $V$-type three-level heat engine is that generated by two independent two-level systems. For $N$ levels, this maximal enhancement is $(N-1)$-fold. Hence, level degeneracy is a thermodynamic resource that may effectively boost the power output. The efficiency, however, is not affected. We find that coherence is not an essential asset in multilevel-based heat machines. The existence of multiple thermalization pathways sharing a common ground state suffices for power enhancement.

@misc{gelbwaserklimovsky2014power, abstract = {We analyze a heat machine based on a periodically-driven quantum system permanently coupled to hot and cold baths. It is shown that the maximal power output of a degenerate $V$-type three-level heat engine is that generated by two independent two-level systems. For $N$ levels, this maximal enhancement is $(N-1)$-fold. Hence, level degeneracy is a thermodynamic resource that may effectively boost the power output. The efficiency, however, is not affected. We find that coherence is not an essential asset in multilevel-based heat machines. The existence of multiple thermalization pathways sharing a common ground state suffices for power enhancement.}, added-at = {2014-11-06T12:18:55.000+0100}, author = {Gelbwaser-Klimovsky, David and Niedenzu, Wolfgang and Brumer, Paul and Kurizki, Gershon}, biburl = {https://www.bibsonomy.org/bibtex/28d3657863ad1366a9e4176e550e5fa29/scavgf}, description = {Power enhancement of heat engines via correlated thermalization in multilevel systems}, interhash = {3f000fd357a6525e110a2a6530a55604}, intrahash = {8d3657863ad1366a9e4176e550e5fa29}, keywords = {engines heat}, note = {cite arxiv:1411.1388}, timestamp = {2014-11-06T12:18:55.000+0100}, title = {Power enhancement of heat engines via correlated thermalization in multilevel systems}, url = {http://arxiv.org/abs/1411.1388}, year = 2014 }