摘要
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 Melectron-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.
作者
刘永婷
吴一鸣
杜芳芳
Yong-Ting Liu;Yi-Ming Wu;Fang-Fang Du(Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China)
基金
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)
the Scientific and Technological Innovation Program of Higher Education Institutions of Shanxi Province,China(Grant No.2019L0507)。