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Self-error-rejecting multipartite entanglement purification for electron systems assisted by quantum-dot spins in optical microcavities |
| Yong-Ting Liu(刘永婷), Yi-Ming Wu(吴一鸣), and Fang-Fang Du(杜芳芳)† |
| Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China |
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Abstract We present a self-error-rejecting multipartite entanglement purification protocol (MEPP) for N-electron-spin entangled states, resorting to the single-side cavity-spin-coupling system. Our MEPP has a high efficiency containing two steps. One is to obtain high-fidelity N-electron-spin entangled systems with error-heralded parity-check devices (PCDs) in the same parity-mode outcome of three electron-spin pairs, as well as M-electron-spin entangled subsystems (2≤M <N) in the different parity-mode outcomes of those. The other is to regain the N-electron-spin entangled systems from M-electron-spin entangled states utilizing entanglement link. Moreover, the quantum circuits of PCDs make our MEPP works faithfully, due to the practical photon-scattering deviations from the finite side leakage of the microcavity, and the limited coupling between a quantum dot and a cavity mode, converted into a failed detection in a heralded way.
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Received: 12 October 2021
Revised: 16 December 2021
Accepted manuscript online:
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Hk
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(Quantum communication)
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03.67.Dd
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(Quantum cryptography and communication security)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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| Fund: Project supported in part by the National Natural Science Foundation of China (Grant No.61901420),the Shanxi Provincial Science Foundation for Youths (Grant No.201901D211235),and the Scientific and Technological Innovation Program of Higher Education Institutions of Shanxi Province,China (Grant No.2019L0507). |
Corresponding Authors:
Fang-Fang Du,E-mail:Duff@nuc.edu.cn
E-mail: Duff@nuc.edu.cn
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| About author: 2021-12-18 |
Cite this article:
Yong-Ting Liu(刘永婷), Yi-Ming Wu(吴一鸣), and Fang-Fang Du(杜芳芳) Self-error-rejecting multipartite entanglement purification for electron systems assisted by quantum-dot spins in optical microcavities 2022 Chin. Phys. B 31 050303
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