Efficient three-step entanglement concentration for an arbitrary four-photon cluster state

作     者：司斌 苏石磊 孙立莉 程留永 王洪福 张寿 

作者机构：Department of PhysicsCollege of ScienceYanbian University Center for the Condensed-Matter Science and TechnologyDepartment of PhysicsHarbin Institute of Technology School of Physics and Optoelectronic TechnologyDalian University of Technology 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2013年第22卷第3期

页      面：137-142页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 61068001 and 11264042) the Talent Program of Yanbian University,China (Grant No. 950010001) the National Science Foundation for Post-doctoral Scientists of China (Grant No. 2012M520612) the Program for Chun Miao Excellent Talents of Department of Education of Jilin Province,China (Grant No. 201316) 

主　　题：cluster state entanglement concentration cross-Kerr nonlinearity 

摘      要：We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster *** a pioneering three-step entanglement concentration scheme,our protocol only needs a single-photon resource to assist the concentration in each step,which makes this protocol more *** the help of the linear optical elements and weak cross-Kerr nonlinearity,one can obtain a maximally-entangled cluster state via local operations and classical ***,the protocol can be iterated to obtain a higher success probability and is feasible under current experimental conditions.