Improving the teleportation of quantum Fisher information under non-Markovian environment  

作　　者：李艳玲 曾艺博 姚林 肖兴 Yan-Ling Li;Yi-Bo Zeng;Lin Yao;Xing Xiao(School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;College of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China)

机构地区：[1]School of Information Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China [2]College of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China

出　　处：《Chinese Physics B》2023年第1期172-177,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.61765007 and 12265004);Jiangxi Provincial Natural Science Foundation,China (Grant No.20212ACB211004);Innovation Foundation of Jiangxi University of Science and Technology (Grant No.XY2021-S088)。

摘　　要：Quantum teleportation is designed to send an unknown quantum state between two parties.In the perspective of remote quantum metrology,one may be interested in teleporting the information that is encoded by physical parameters synthesized by quantum Fisher information(QFI).However,the teleported QFI is often destroyed by the unavoidable interaction between the system and the environment.Here,we propose two schemes to improve the teleportation of QFI in the non-Markovian environment.One is to control the quantum system through the operations of weak measurement(WM)and corresponding quantum measurement reversal(QMR).The other is to modify the quantum system based on the monitoring result of the environment(i.e.,environment-assisted measurement,EAM).It is found that,in the non-Markovian environment,these two schemes can improve the teleportation of QFI.By selecting the appropriate strengths of WM and QMR,the environment noise can be completely eliminated and the initial QFI is perfectly teleported.A comprehensive comparison shows that the second scheme not only has a higher probability of success than the first one,but also has a significant improvement of the teleported QFI.

关 键 词：weak measurement environment-assisted measurement teleportation of quantum Fisher information 

分 类 号：O41[理学—理论物理]