Manzano Paule, GonzaloGalve, FernandoZambrini, RobertaRodríguez Parrondo, Juan Manuel2023-06-182023-06-182016-05-102470-004510.1103/PhysRevE.93.052120https://hdl.handle.net/20.500.14352/24567©2016 American Physical Society. All authors acknowledge support from COST Action MP1209. G.M. and J.M.R.P. acknowledge funding from MINECO (Grant No. FIS2014-52486-R). F.G. and R.Z. acknowledge funding from MINECO (Grant No. FIS2014-60343-P) and EU project QuProCS (Grant Agreement No. 641277). F.G. acknowledges support from "Vicerectorat d'lnvestigacio i Postgrau" of the UIB and G.M. from FPI Grant No. BES-2012-054025.We analyze the entropy production and the maximal extractable work from a squeezed thermal reservoir. The nonequilibrium quantum nature of the reservoir induces an entropy transfer with a coherent contribution while modifying its thermal part, allowing work extraction from a single reservoir, as well as great improvements in power and efficiency for quantum heat engines. Introducing a modified quantum Otto cycle, our approach fully characterizes operational regimes forbidden in the standard case, such as refrigeration and work extraction at the same time, accompanied by efficiencies equal to unity.engjournal articlehttp://dx.doi.org/10.1103/PhysRevE.93.052120http://journals.aps.org/open access539.1Heat engineQuantum thermodynamicsSystemsWorkInformationCoherenceStatesNoiseModel.Física nuclear2207 Física Atómica y Nuclear