Different constructions and optimization of the irreversible quantum Carnot cycle

摘要: The irreversible Carnot cycle is designed, constructed and optimized for quantum systems with non-scalable energy levels. In the cycle, thermalization strokes are interpreted as either conserving steps or isochoric processes. It found that latter construction necessary to optimize efficiency. A strict connection between two interpretations given in terms of entropy production efficiency lag. Two spins 1/2 interacting within Heisenberg XXX model under a tunable magnetic field proposed working system cycle. always below classical depends on parameters medium heat baths. role reservoir temperatures interaction revealed. Quantum coupling have destructive performance which decreases makes cease operate engine after critical value. System parameter regimes revealed where close notably higher than one conserves stages.