Multipartite entanglement concentration for nitrogen-vacancy center and microtoroidal resonator system  

作　　者：SHENG YuBo LIU Jiong ZHAO ShengYang ZHOU Lan 

机构地区：[1]Key Laboratory of Broadband Wireless Communication and Sensor Network Technology,Nanjing University of Posts and Telecommunications,Ministry of Education [2]Institute of Signal Processing Transmission,Nanjing University of Posts and Telecommunications [3]College of Mathematics and Physics,Nanjing University of Posts and Telecommunications

出　　处：《Chinese Science Bulletin》2013年第28期3507-3513,共7页

基　　金：supported by the National Natural Science Foundation of China(11104159);Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics Scientific,Tsinghua University,Open Research Fund Program of National Laboratory of Solid State Microstructures,Nanjing University(M25022);the Project Funded by the Priority,University Natural Science Research Project of Jiangsu Province(13KJB140010);Academic Program Development of Jiangsu Higher Education Institutions and the Open Research Fund of Key Laboratory of Broadband Wireless Communication and Sensor Network Technology;Nanjing University of Posts and Telecommunications,Ministry of Education(NYKL201303)

摘　　要：We describe a high efcient entanglement concentration protocol(ECP)for multi-particle less-entangled nitrogen-vacancy(N-V)center and microtoroidal resonator system.In the ECP,we only require one pair of less-entangled state,two auxiliary N-V center in microcavities and some single photons.After the photon passing through the microcavity,by measuring the polarization of the photon,a maximally entangled W state can be obtained with some success probability.This ECP does not need to destroy the solid qubit,which makes it more feasible.Moreover,by resorting to more single photons,it can be repeated to reach a high success probability.These features make this ECP useful in current long-distance quantum communications.We describe a high efficient entanglement concentration protocol （ECP） for multi-particle less-entangled nitrogen-vacancy （N-V） center and microtoroidal resonator system. In the ECP, we only require one pair of less-entangled state, two auxiliary N-V center in microcavities and some single photons. After the photon passing through the microcavity, by measuring the polarization of the photon, a maximally entangled W state can be obtained with some success probability. This ECP does not need to destroy the solid qubit, which makes it more feasible. Moreover, by resorting to more single photons, it can be repeated to reach a high success probability. These features make this ECP useful in current long-distance quantum communications.

关 键 词：谐振系统 纠缠态 空位 浓缩 远距离量子通信 氮 成功概率 ECP 

分 类 号：O413[理学—理论物理] TN918[理学—物理]