Gelbwaser-Klimovsky, DavidNiedenzu, WolfgangBrumer, PaulKurizki, Gershon2015-10-012015Gelbwaser-Klimovsky, David, Wolfgang Niedenzu, Paul Brumer, and Gershon Kurizki. 2015. “Power enhancement of heat engines via correlated thermalization in a three-level “working fluid”.” Scientific Reports 5 (1): 14413. doi:10.1038/srep14413. http://dx.doi.org/10.1038/srep14413.2045-2322http://nrs.harvard.edu/urn-3:HUL.InstRepos:22856911We explore means of maximizing the power output of a heat engine based on a periodically-driven quantum system that is constantly coupled to hot and cold baths. It is shown that the maximal power output of such a heat engine whose “working fluid” is a degenerate V-type three-level system is that generated by two independent two-level systems. Hence, level degeneracy is a thermodynamic resource that may effectively double the power output. The efficiency, however, is not affected. We find that coherence is not an essential asset in such multilevel-based heat engines. The existence of two thermalization pathways sharing a common ground state suffices for power enhancement.en-USJournal Article2015-10-0110.1038/srep14413