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

GUO Xiuli; ZHANG Yanliang; KANG Guodong; ZHOU Qingping

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

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The protection schemes of the entangle-ment in the system of two entangled atoms from non-Markovian 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) (scheme 2) 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 scheme 1 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 post-WMR can effectively enhance entanglement and shorten the time of Entanglement sudden death (ESD) in non-Makovain environment. We have found the optimum of WM strengthens is drastically related to the initial entangled state.

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《电子学报（英文版）》 |2019年第3期|593-597|共5页
作者
GUO Xiuli; ZHANG Yanliang; KANG Guodong; ZHOU Qingping;
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School of Physics and Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China;

School of Software and Service Outsourcing, Jishou University, Zhangjiajie 427000, China;

School of Physics and Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China;

School of Software and Service Outsourcing, Jishou University, Zhangjiajie 427000, China;

School of Physics and Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China;

School of Software and Service Outsourcing, Jishou University, Zhangjiajie 427000, China;

School of Physics and Mechanical and Electrical Engineering, Jishou University, Jishou 416000, China;

School of Software and Service Outsourcing, Jishou University, Zhangjiajie 427000, China;

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

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