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Protecting Qutrit-Qutrit Entanglement Under Decoherence via Weak Measurement and Measurement Reversal

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Abstract

We investigate the entanglement protection of a qutrit-qutrit system under local amplitude damping channels by weak measurement and measurement reversal. We examine the Δ-type of initially entangled qutrit-qutrit states. We find that the entanglement decays with the decoherence strength increasing for the qutrit-qutrit state. Therefore, we focus on how to protect the quantum entanglement from decoherence by weak measurement and measurement reversal. Our results show that we can prevent amplitude damping decoherence by the combination of prior weak measurement and post optimal measurement reversal comparing with the dynamics without protection. Regardless of the value of decoherence, the protection scheme has better effect on the kind of V-configuration. And with the increase of decoherent strength, the difference is more obvious. Another interesting result is that the enhancement of the entanglement is very weak when decoherent strength is zero.

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Acknowledgments

Acknowledgements This work was supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2017MF040).

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Authors and Affiliations

  1. Department of Physics and Optoelectronic Engineering, Weifang University, Weifang, 261061, China

    MeiJiao Wang, YingDe Li, Yang Yang, LianZhen Cao, QinWei Zhang & JiaQiang Zhao

  2. College of Physics and Engineering, Qufu Normal University, Qufu, 273165, China

    YunJie Xia

  3. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Qufu Normal University, Qufu, 273165, China

    YunJie Xia

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  1. MeiJiao Wang
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Correspondence to JiaQiang Zhao.

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Wang, M., Xia, Y., Li, Y. et al. Protecting Qutrit-Qutrit Entanglement Under Decoherence via Weak Measurement and Measurement Reversal. Int J Theor Phys 59, 3696–3704 (2020). https://doi.org/10.1007/s10773-020-04606-x

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  • DOI: https://doi.org/10.1007/s10773-020-04606-x

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