Entanglement Protection of Two-Qubit System in Non-Markovian Reservoir via Weak Measurement and Weak Measurement Reversal

作     者：GUO Xiuli ZHANG Yanliang KANG Guodong ZHOU Qingping GUO Xiuli;ZHANG Yanliang;KANG Guodong;ZHOU Qingping

作者机构：School of Physics and Mechanical and Electrical Engineering Jishou University School of Software and Service Outsourcing Jishou University 

出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))

年 卷 期：2019年第28卷第3期

页      面：593-597页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070201[理学-理论物理] 0701[理学-数学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.11464015) the Provincial Natural Science Foundation of Hunan(No.14jj6035) Education Department Outstanding Young Project of Hunan(No.14B147) 

主　　题：Entanglement protection Weak measurement Weak measurement reversal Non-Makovain environment 

摘      要：The protection schemes of the entanglement in the system of two entangled atoms from nonMarkovian reservoirs via previous Weak measurement(pre-WM) and posterior Weak measurement reversal(post-WMR) are investigated. We firstly compare the effects of combination applying of pre-WM and post-WMR(scheme 1) and twice Weak measurements(WMs)(scheme2) in the condition of different initial entangled states.The analysis indicates that the protection performance of scheme 1 is much better than that of scheme 2. The scheme1 was utilized when the system of two entangled atoms suffers from the independent reservoirs. The numerical results show that the combination of pre-WM and postWMR can effectively enhance entanglement and shorten the time of Entanglement sudden death(ESD) in nonMakovain environment. We have found the optimum of WM strengthens is drastically related to the initial entangled state.