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Protecting entanglement from correlated amplitude damping channel using weak measurement and quantum measurement reversal

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Abstract

Based on the quantum technique of weak measurement, we propose a scheme to protect the entanglement from correlated amplitude damping decoherence. In contrast to the results of memoryless amplitude damping channel, we show that the memory effects play a significant role in the suppression of entanglement sudden death and protection of entanglement under severe decoherence. Moreover, we find that the initial entanglement could be drastically amplified by the combination of weak measurement and quantum measurement reversal even under the correlated amplitude damping channel. The underlying mechanism can be attributed to the probabilistic nature of weak measurements.

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Acknowledgments

This work is supported by the Funds of the National Natural Science Foundation of China under Grant Nos. 11247006 and 11365011.

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Authors and Affiliations

  1. College of Physics and Electronic Information, Gannan Normal University, Ganzhou, 341000, China

    Xing Xiao, Ying-Mao Xie & Xing-Hua Wang

  2. Microsystems and Terahertz Research Center, China Academy of Engineering Physics, Chengdu, 610200, Sichuan, China

    Yao Yao

  3. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Yan-Ling Li

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  1. Xing Xiao
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  2. Yao Yao
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  3. Ying-Mao Xie
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  4. Xing-Hua Wang
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  5. Yan-Ling Li
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Correspondence to Ying-Mao Xie.

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Xiao, X., Yao, Y., Xie, YM. et al. Protecting entanglement from correlated amplitude damping channel using weak measurement and quantum measurement reversal. Quantum Inf Process 15, 3881–3891 (2016). https://doi.org/10.1007/s11128-016-1356-2

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  • DOI: https://doi.org/10.1007/s11128-016-1356-2

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