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

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.

Entanglement protectionWeak mea-surementWeak measurement reversalNon-Makovain environment

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

National Natural Science Foundation of ChinaProvincial Natural Science Foundation of HunanEducation Department Outstanding Young Project of Hunan

1146401514jj603514B147

2019

10.1049/cje.2018.06.004

中国电子杂志(英文版)

中国电子杂志(英文版)

CSTPCDCSCDSCIEI
ISSN：1022-4653
年,卷(期)：2019.28(3)
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