Entanglement concentration for an arbitrary hybrid less-entangled state and W state using quantum dots and a microcavity coupled system  

作　　者：曹聪 王川 张茹 

机构地区：[1]School of Science,Beijing University of Posts and Telecommunications

出　　处：《Chinese Physics B》2012年第11期85-93,共9页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No. 2010CB923202);the Specialized Research Fund for the Doctoral Program of Ministry of Education of China (Grant No.20090005120008);the Fundamental Research Funds for the Central Universities of China;the National Natural Science Foundation of China (Grant Nos. 60937003,61178010,and 61205117)

摘　　要：We propose a practical entanglement concentration protocol （ECP） for a hybrid entangled state using quantum dots and a microcavity coupled system. A hybrid less-entangled state can he concentrated to a most-entangled state with a certain probability using only one ancillary single photon. Moreover, using this protocol, we can also concentrate an arbitrary three-particle less-entangled W state using two ancillary photons and classical communication. The proposed protocols provide us with a useful method to concentrate less-entangled states, which can he implemented with current technology.We propose a practical entanglement concentration protocol （ECP） for a hybrid entangled state using quantum dots and a microcavity coupled system. A hybrid less-entangled state can he concentrated to a most-entangled state with a certain probability using only one ancillary single photon. Moreover, using this protocol, we can also concentrate an arbitrary three-particle less-entangled W state using two ancillary photons and classical communication. The proposed protocols provide us with a useful method to concentrate less-entangled states, which can he implemented with current technology.

关 键 词：entanglement concentration quantum dot MICROCAVITY W state 

分 类 号：O431.2[机械工程—光学工程]