Two-level quantum Otto heat engine operating with unit efficiency far from the quasi-static regime under a squeezed reservoir

Recent theoretical and experimental studies in quantum heat engines show that, the quasi-static regime, it is possible to have higher efficiency than limit imposed by Carnot, provided that engineered reservoirs are used. The however, a strong limitation operation of engines, since infinitely long time required complete cycle. In this paper we propose two-level model as working substance perform Otto engine surrounded cold thermal reservoir squeezed hot reservoir. Taking advantage striking achievement, attain unity even at non null power.