Efficient scheme for realizing quantum dense coding with GHZ state in separated low-Q cavities  

作　　者：孙倩 何娟 叶柳 

机构地区：[1]School of Physics & Material Science, Anhui University [2]School of Physics & Electronics Science, Fuyang Normal College

出　　处：《Chinese Physics B》2014年第6期44-50,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11074002 and 61275119);the Doctoral Foundation of the Ministry of Education of China(Grant No.20103401110003);the Natural Science Research Project of Education Department of Anhui Province,China(Grant Nos.KJ2013A205,KJ2011ZD07,and KJ2012Z309)

摘　　要：We propose an efficient scheme for realizing quantum dense coding with three-particle GHZ state in separated low-Q cavities. In this paper, the GHZ state is first prepared with three atoms trapped, respectively, in three spatial separated cavities. Meanwhile, with the assistance of a coherent optical pulse and X-quadrature homodyne measurement, we can im- plement quantum dense coding with three-particle GHZ state with a higher probability. Our scheme can also be generalized to realize N-particle quantum dense coding.We propose an efficient scheme for realizing quantum dense coding with three-particle GHZ state in separated low-Q cavities. In this paper, the GHZ state is first prepared with three atoms trapped, respectively, in three spatial separated cavities. Meanwhile, with the assistance of a coherent optical pulse and X-quadrature homodyne measurement, we can im- plement quantum dense coding with three-particle GHZ state with a higher probability. Our scheme can also be generalized to realize N-particle quantum dense coding.

关 键 词：GHZ state quantum dense coding low-Q cavity X-quadrature homodyne measurement 

分 类 号：O413[理学—理论物理]