基于一个共享辅助逻辑Bell态的抗集体噪声鲁棒量子对话  

Robust quantum dialogue based on a shared auxiliary logical Bell state against collective noise

作　　者：叶天语[1] 

机构地区：[1]浙江工商大学信息与电子工程学院,杭州310018

出　　处：《中国科学：物理学、力学、天文学》2015年第4期37-46,共10页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金资助项目(批准号:61402407;11375152)

摘　　要：本文分别提出两个抵抗集体退相位噪声和集体旋转噪声的鲁棒量子对话(Quantum Dialogue,QD)协议.在每个提出的QD协议中,每个由4物理量子比特构成的4个逻辑Bell态被用于对抗集体噪声.信息泄露问题通过从一个通信方向另一个通信方直接两步传送辅助逻辑Bell态来克服.Bell态测量而非4量子比特联合测量被用于解码.抵抗窃听者主动攻击(如截获-重发攻击、测量-重发攻击、纠缠-测量攻击和木马攻击)的有效性能够得到保证.In this paper, two robust quantum dialogue （QD） protocols against collective-dephasing noise and collective-rotation noise are presented, respectively. In each of the proposed QD protocols, four logical Bell states, each of which is made up of four physical qubits, are used to combat collective noise. The information leakage problem is overcome by directly transmitting the auxiliary logical Bell states in two steps from one communication party to the other. For decoding, Bell state measurements rather than four-qubit joint measurements are used. The effectiveness against an eavesdropper＇s active attacks such as the intercept-resend attack, the measure-resend attack, the entangle-measure attack and the Trojan horse attack can be guaranteed.

关 键 词：量子对话 信息泄露 逻辑Bell态 集体退相位噪声 集体旋转噪声 BELL态测量 

分 类 号：O413.1[理学—理论物理]