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Protecting tripartite entanglement in non-Markovian environments via quantum partially collapsing measurements

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Abstract

In this paper, the dynamics of tripartite entanglement via \(\pi \)-tangle in independent non-Markovian environments is investigated. The results indicate that the \(\pi \)-tangle vanishes periodically as decoherence time increases with a damping of its revival amplitude due to the memory of the non-Markovian environments. In addition, we present a scheme to protect entanglement of W state from non-Markovian environments by means of the quantum partially collapsing measurements. It is worth mentioning that our scheme is a successful protection for the tripartite quantum system and the effect is better for the larger measurement strength, while the stronger decoherence suppression induces smaller success probability.

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Acknowledgments

This work was supported by the National Science Foundation of China (Grant Nos. 61275119 and 11575001), the Natural Science Research Project of Education Department of Anhui Province of China under Grant No. KJ2016A547, and also by the Doctoral Foundation of Fuyang Normal University (Grant No. FYNU1602).

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Authors and Affiliations

  1. School of Physics and Material Science, Anhui University, Hefei, 230039, China

    Zhi-Yong Ding & Liu Ye

  2. School of Physics and Electronic Engineering, Fuyang Normal University, Fuyang, 236037, China

    Zhi-Yong Ding & Juan He

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  1. Zhi-Yong Ding
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  2. Juan He
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  3. Liu Ye
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Correspondence to Liu Ye.

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Ding, ZY., He, J. & Ye, L. Protecting tripartite entanglement in non-Markovian environments via quantum partially collapsing measurements. Quantum Inf Process 15, 3273–3283 (2016). https://doi.org/10.1007/s11128-016-1342-8

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  • DOI: https://doi.org/10.1007/s11128-016-1342-8

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