集体噪声信道上基于逻辑量子比特可控的量子对话协议  

Controlled quantum dialogue based on logical qubits over the collective-noise channel

作　　者：黄红梅[1,2] 

机构地区：[1]西安电子科技大学电子工程学院,西安710071 [2]武警工程大学,西安710086

出　　处：《激光杂志》2017年第1期69-74,共6页Laser Journal

基　　金：国家自然科学基金(61401340;61402529)

摘　　要：利用逻辑量子比特提出两个分别抵抗集体退相位噪声和集体旋转噪声的可控的鲁棒量子对话协议。Alice制备逻辑单光子序列,每相邻的两个逻辑单光子处于相同的量子态,发送给控制方Charlie,经幺正变换后,发送给Bob,Bob对编码序列进行编码,然后回送给Alice,Alice再进行编码,公布测量结果,在Charlie的帮助下,Alice和Bob可获得秘密消息。相比已有协议所提出的协议最大优点是第三方可控的,效率较高,无信息泄露问题,利用逻辑量子比特传输克服了集体噪声。对协议进行安全性分析证明了协议的有效性。Two controlled quantum dialogue protocols are proposed based on logical qubits against the collective- dephasing noise and the collective-rotation noise, respectively. Firstly, Alice prepares a logical single photon sequence, and makes two adjacent photons in the same state, then sends it to controller Charlie, secondly Charlie carries unitary operations on it, then sends it to Bob, thirdly, Bob encodes the secret message, send it back to Alice, Alice encode the secret message too, and announces the measure result, with the help of Charlie, Alice and Bob can obtain secret message. Comparing with other protocols, this protocol is third party controlled, high efficiency, no information leakage , and overcomes collective noise. Its validity is proved by the security analysis.

关 键 词：量子对话 集体噪声 可控的 逻辑量子比特 无信息泄露 

分 类 号：O431.2[机械工程—光学工程] TN918.1[理学—光学]