Quantum interferometric power and non-Markovianity in the decoherence channels  

作　　者：熊少杰 孙哲 王晓光 Shaojie Xiong;Zhe Sun;Xiaoguang Wang(Zhejiang Institute of Modern Physics and Department of Physics,Zhejiang University,Hangzhou 310027,China;Department of Physics,Hangzhou Normal University,Hangzhou 310036,China;Key Laboratory of Optical Field Manipulation of Zhejiang Province and Department of Physics,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]Zhejiang Institute of Modern Physics and Department of Physics,Zhejiang University,Hangzhou 310027,China [2]Department of Physics,Hangzhou Normal University,Hangzhou 310036,China [3]Key Laboratory of Optical Field Manipulation of Zhejiang Province and Department of Physics,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Chinese Physics B》2023年第8期156-160,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11935012,12175052,and 11775065);the Postdoctoral Science Foundation of China(Grant No.2022M722794)。

摘　　要：In quantum open systems,non-Markovianity is an important phenomenon that allows a backflow of information from the environment to the system.In this work,we investigate the non-Markovianity problems in two different types of channels,where the system-environment interactions are treated with and without the rotating-wave approximation(RWA).We employ the quantum interferometric power(QIP)to quantify the non-Markovian dynamics,which is the minimal quantum Fisher information obtained by the local unitary evolution in a bipartite system.By the hierarchy equation method,we calculate the dynamical evolution of the QIP in the non-RWA case.The results show that the dynamical behavior under the non-RWA is significantly different from that under the RWA in both weak and strong coupling.Moreover,in the non-RWA case,we also find the nonmonotonic behavior of the non-Markovianity measure with the variation of coupling strength,which is caused by the competition between the rotating-wave terms and the counterrotating-wave terms.As a result,we highlight the importance of the counterrotating-wave terms for the influence of non-Markovianity.

关 键 词：quantum open system auantum non-Markovianity auantum interferometric power 

分 类 号：O413[理学—理论物理]