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Enhancing entanglement of assistance using weak measurement and quantum measurement reversal in correlated amplitude damping channel

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Abstract

Entanglement of assistance from multipartite to fewer partites (e.g., bipartite) entangled state via measurements is an important way for generating entanglement. Here, we study the dynamics of entanglement of assistance from a tripartite W-like state to a bipartite Bell-like state under correlated amplitude damping channel using weak measurement and quantum measurement reversal. Our results show that the correlation between environmental noises plays a positive role in enhancing the entanglement of assistance, and in particular, it also works very well for very large decoherence strength of channel. More importantly, we find that an almost maximal two-qubit entangled state in the total region of decoherence strength can be obtained from the originally W-like state with a better success probability. The proposed scheme provides an active way in combating the amplitude damping noises, which may have potential applications in quantum communication and distributed quantum computation.

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Acknowledgements

This work is supported by China Postdoctoral Science Foundation (Grant No. 2017M622582), the Natural Science Foundation of Hunan Province, China (Grant No. 2020JJ4443), the Research Foundation of Education Bureau of Hunan Province, China (Grant No. 19A339), Applied Characteristic Disciplines in Hunan Province-Electronic Science and Technology, and Hunan Province Key Laboratory of Photoelectric Information Integration and Optical Manufacturing Technology.

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Authors and Affiliations

  1. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, 410081, China

    Zhi He & Hao-Sheng Zeng

  2. College of Mathematics and Physics Science, Hunan University of Arts and Science, Changde, 415000, China

    Zhi He

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  1. Zhi He
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  2. Hao-Sheng Zeng
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Correspondence to Zhi He.

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He, Z., Zeng, HS. Enhancing entanglement of assistance using weak measurement and quantum measurement reversal in correlated amplitude damping channel. Quantum Inf Process 19, 299 (2020). https://doi.org/10.1007/s11128-020-02791-6

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