Switching the function of the quantum Otto cycle in non-Markovian dynamics: Heat engine, heater, and heat pump

• DOI: 10.1103/physrevresearch.5.023066
• Publication Date: 2023-04-27T15:30:18Z
• Authors: Miku Ishizaki; Naomichi Hatano; Hiroyasu Tajima
• Keywords: Quantum thermodynamics; Heat Engine

Quantum thermodynamics explores novel thermodynamic phenomena that emerge when interactions between macroscopic systems and microscopic quantum ones go into action. Among various issues, heat engines, in particular, have attracted much attention as a critical step theoretical formulation of investigation efficient use by means resources. In the present paper, we focus on absorption emission processes well work extraction Otto cycle. We describe former non-Markovian dynamics, thereby find interaction energy bath qubit is not negligible. Specifically, reveal divided system region short time remains negative long time. addition, counterintuitive flow from to hot occurs another quantify these effects defining an index non-Markovianity terms energy. With this behavior energy, show cycle can switch functions such engine heater or pump controlling with bath. itself loses its if shorten time, sense, cooled through This property has possibility being utilized for cooling qubits computing. also like us humans indirect measurement process introducing storage new reservoir.