Non-Markovian effect on quantum Otto engine: Role of system-reservoir interaction

We study a limit cycle of quantum Otto engine whose every consists two finite-time isochoric (heating or cooling) processes and adiabatic work-extracting processes. Considering two-level system as working substance that weakly interacts with reservoirs comprising an infinite number bosons, we investigate the non-Markovian effect [short-time behavior reduced dynamics in (QIPs)] on work extraction after repetition cycles. focus parameter region where energy transferred to reservoir can come back short-time regime, which call backflow show partial quantum-mechanical reversibility. As situation completely different from macroscopic thermodynamics, find interaction is finite negative by evaluating average change during QIPs means full-counting statistics, corresponding two-point measurements. This feature leads us following findings: (1) The Carnot theorem consistent definition including energy, although commonly used excluding serious conflict thermodynamic law, (2) increase extraction. Our findings need pay attention designing operated time, requires include effect, even when system-reservoir weak.2 MoreReceived 5 June 2020Accepted 29 March 2021DOI:https://doi.org/10.1103/PhysRevResearch.3.023078Published American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasQuantum statistical mechanicsQuantum thermodynamicsPhysical SystemsQuantum heat engines & refrigeratorsTechniquesNon-Markovian processesStatistical PhysicsGeneral Physics