Work flux and efficiency at maximum power of a triply squeezed engine

Abstract

We explore the effects of quantum mechanical squeezing on the nonequilibrium thermodynamics of a coherent heat engine with squeezed reservoirs coupled to a squeezed cavity. We observe that the standard known phenomenon of flux optimization beyond the classical limit with respect to quantum coherence is destroyed as the cavity is squeezed. This loss is independent of reservoir squeezing. Under biased conditions, the squeezing-dependent flux is always higher than the classical limit. The efficiency at maximum power (EMP) in the presence of cavity-squeezing is greater than what was predicted by Curzon and Ahlborn even in the absence of reservoir squeezing. The EMP with respect to either reservoir's squeezing parameters is surprisingly equal and linear in ${\ensuremath{\eta}}_{C}$ with a slope unequal to the universally accepted slope, $1/2$. The slope is found to be proportional to the dissipation into the cavity mode with an intercept proportional to a specific numerical value of the engine's efficiency.