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We theoretically prose and investigate a photo-Otto engine that is workingwith a single-mode radiation field inside an optical cavity and alternativelydriven by a hot and a cold reservoir, where the hot reservoir is realized bysending one of a pair of correlated two-level atoms to pass through the opticalcavity, and the cold one is made of a collection of noninteracting boson modes.In terms of the quantum discord of the pair of atoms, we derive the analyticalexpressions for the performance parameters (power and efficiency) and stabilitymeasure (coefficient of variation for power). We show that quantum discordboosts the performance and efficiency of the quantum engine, and even maychange the operation mode. We also demonstrate that quantum discord improvesthe stability of machine by decreasing the coefficient of variation for powerwhich satisfies the generalized thermodynamic uncertainty relation. Finally, wefind that these results can be transferred to another photo-Otto engine model,where the optical cavity is alternatively coupled to a hot thermal bosonic bathand to a beam of pairs of the two correlated atoms that play the role of a coldreservoir.

Quantum Otto engine with quantum correlations