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Two-partite entanglement purification assisted by quantum-dot spins inside single-sided optical microcavities

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Abstract

Entanglement purification is an important and useful tool in quantum communications that allows parties to enhance the entanglement of a set of less-entangled particles using local operations and classical communication. Utilizing photon polarization parity checks implemented through the coupling system between a single-sided cavity and a charged quantum dot, an entanglement purification scheme is proposed in this paper. The fidelity and the success probability of the scheme are calculated under bit-flip error channel and depolarizing channel, respectively. Furthermore, the impact of imperfect quantum-dot-cavity coupling system is investigated, and the feasibility is discussed. In the strong coupling and weak cavity side leakage regime, our scheme can approach the maximal fidelities and success probabilities in theory. So the scheme has potential applications in long-distance quantum communication with the development of relevant technologies.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (12247214), the Liaoning Revitalization Talents Program (XLYC1807206), the LiaoNing BaiQianWan Talents Program (2021921096), the Natural Science Foundation of Liaoning Province (2021-MS-317, 2022-MS-372), and the Education Administration Program of Liaoning Province (LJKZ1015, LJKZZ20220120, JYTMS20231614).

Funding

National Natural Science Foundation of China (12247214), LiaoNing Revitalization Talents Program (XLYC1807206), LiaoNing BaiQianWan Talents program (2021921096), Natural Science Foundation of LiaoNing Province (2022-MS-372, 2021-MS-317), and Education Administration Program of Liaoning Province (LJKZZ20220120, LJKZ1015, JYTMS20231614).

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Authors and Affiliations

  1. College of Physics Science and Technology, Bohai University, Jinzhou, 121013, People’s Republic of China

    Xiao-Ming Xiu, Si-Tong Liu, Xin-Ying Wang, Liu Lv, Zi-Lin Zhao, Zi-Qing Yuan, Si-Ge Chen, Xin-Yi Zhang, Zi-Long Yang, Yan-Qiang Ji & Li Dong

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  1. Xiao-Ming Xiu
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  2. Si-Tong Liu
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Correspondence to Li Dong.

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Xiu, XM., Liu, ST., Wang, XY. et al. Two-partite entanglement purification assisted by quantum-dot spins inside single-sided optical microcavities. Quantum Inf Process 23, 116 (2024). https://doi.org/10.1007/s11128-024-04324-x

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