Manipulating the measured uncertainty under Lee-Yang dephasing channels through local PT-symmetric operations  

作　　者：Ling-Yu Yao Li-Juan Li Xue-Ke Song Liu Ye Dong Wang 

机构地区：[1]School of Physics and Optoelectronic Engineering,Anhui University,Hefei 230601,China

出　　处：《Frontiers of physics》2023年第5期311-320,共10页物理学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12075001 and 12175001);Anhui Provincial Key Research and Development Plan(Grant No.2022b13020004);Anhui Provincial Natural Science Foundation(Grant No.1508085QF139);the Fund of the CAS Key Laboratory of Quantum Information(Grant No.KQI201701).

摘　　要：Uncertainty relation lies at the heart of quantum physics,which is one of the fundamental characteristics of quantum mechanics.With the advent of quantum information theory,entropic uncertainty relation was proposed,which plays an important and irreplaceable role in quantum information science.In this work,we attempt to observe dynamics of entropic uncertainty in the presence of quantum memory under two different types of Lee-Yang dephasing channels.It is interesting to find that the dephasing channels have a negative effect on decreasing the uncertainty and the analogous partition function is anti-correlated with the uncertainty.In addition,we here propose an effective strategy to manipulate the uncertainty of interest of the subsystem by performing a parity-time symmetric(PT-symmetric)operation.It is worth noting that the uncertainty of measurement will be reduced to a certain extent by properly modulating the PT-symmetric operations under the considered channels.In this sense,we argue that our explorations offer insight into dynamics of entropic uncertainty in typical Lee-Yang dephasing channels,and might be beneficial to quantum measurement estimation in practical quantum systems.

关 键 词：entropic uncertainty relation quantum correlation PT-symmetric operation 

分 类 号：O413[理学—理论物理]