Entanglement fidelity of channel adaptive quantum codes  

作　　者：詹云 陈小余 

机构地区：[1]College of Information and Electronic Engineering, Zhejiang Gongshang University

出　　处：《Chinese Physics B》2013年第1期104-109,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 60972071);the Natural Science Foundation of Zhejiang Province, China(Grant Nos. Y6100421 and LQ12F02012);the Zhejiang Province Science and Technology Project, China (Grant No. 2009C31060)

摘　　要：We study the performances of quantum channel adaptive [4,1] code transmitting in a joint amplitude damping and dephasing channel, the [6,2] code transmitting in an amplitude damping channel by combining the encoding, noise process, and decoding as one effective channel. We explicitly obtain the entanglement fidelities. The recovery operators of the [6,2] code are given. The performance is nearly optimal compared with that of the optimal method of semidefinite programming.We study the performances of quantum channel adaptive [4,1] code transmitting in a joint amplitude damping and dephasing channel, the [6,2] code transmitting in an amplitude damping channel by combining the encoding, noise process, and decoding as one effective channel. We explicitly obtain the entanglement fidelities. The recovery operators of the [6,2] code are given. The performance is nearly optimal compared with that of the optimal method of semidefinite programming.

关 键 词：adaptive quantum code amplitude damping channel FIDELITY 

分 类 号：O413[理学—理论物理] TN911.2[理学—物理]