Self-error-rejecting multipartite entanglement purification for electron systems assisted by quantum-dot spins in optical microcavities  

作　　者：Yong-Ting Liu Yi-Ming Wu Fang-Fang Du 刘永婷;吴一鸣;杜芳芳(Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China)

机构地区：[1]Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China

出　　处：《Chinese Physics B》2022年第5期113-121,共9页中国物理B（英文版）

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)。

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.

关 键 词：quantum communication entanglement purification electron-spin system 

分 类 号：O413.1[理学—理论物理]