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Improving the Capacity of Quantum Dense Coding Via Environment-Assisted Measurement and Quantum Measurement Reversal

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Abstract

We propose a novel method to enhance the capacity of quantum dense coding under local amplitude damping noise. With the assistance of environment-assisted measurement and quantum measurement reversal, we show that the amplitude damping noise could be completely eliminated and the capacity is exactly recovered with a certain probability. Comparing with the results obtained by the method of weak measurement and quantum measurement reversal, our results show notable superiorities on improving the capacity and successful probability. The key advantage of our scheme originates from the fact that environment-assisted measurement can extract additional information from the environment.

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Acknowledgments

This work is supported by the Funds of the National Natural Science Foundation of China under Grant Nos. 61765007. YL Li is supported by the Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology.

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Authors and Affiliations

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

    Yan-Ling Li, Dong-Mei Wei & Chuan-Jin Zu

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  1. Yan-Ling Li
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  2. Dong-Mei Wei
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  3. Chuan-Jin Zu
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Correspondence to Yan-Ling Li.

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Li, YL., Wei, DM. & Zu, CJ. Improving the Capacity of Quantum Dense Coding Via Environment-Assisted Measurement and Quantum Measurement Reversal. Int J Theor Phys 58, 1–9 (2019). https://doi.org/10.1007/s10773-018-3904-2

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  • DOI: https://doi.org/10.1007/s10773-018-3904-2

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