Influence of an indefinite causal order on an Otto heat engine  

作　　者：Jifei Zhao Youyang Xu 

机构地区：[1]Faculty of Science,Kunming University of Science and Technology,Kunming 650500,China

出　　处：《Communications in Theoretical Physics》2022年第2期118-122,共5页理论物理通讯（英文版）

基　　金：supported by National Natural Science Foundation of China under Grant No.11965012;Yunan Province’s Hi-tech Talents Recruitment Plan No.YNWR-QNBJ-2019-245。

摘　　要：The quantum effect plays an important role in quantum thermodynamics,and recently the application of an indefinite causal order to quantum thermodynamics has attracted much attention.Based on two trapped ions,we propose a scheme to add an indefinite causal order to the isochoric cooling stroke of an Otto engine through reservoir engineering.Then,we observe that the quasi-static efficiency of this heat engine is far beyond the efficiency of a normal Otto heat engine and may reach one.When the power is its maximum,the efficiency is also much higher than that of a normal Otto heat engine.This enhancement may originate from the nonequilibrium of the reservoir and the measurement on the control qubit.

关 键 词：indefinite causal order Otto engine quantum thermodynamics 

分 类 号：O414.1[理学—理论物理] O413[理学—物理]