基于四粒子cluster态的N位量子态秘密共享方案  

Scheme of N-qubit secret sharing based on four-particle cluster state

作　　者：吴君钦[1] 林慧英[1] 

机构地区：[1]江西理工大学信息工程学院,江西赣州341000

出　　处：《量子电子学报》2015年第4期472-477,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金项目(11062002);江西省自然(青年)科学基金项目(2008GZS0030)

摘　　要：为了实现N位量子态秘密共享,提出利用四粒子cluster态作为量子信道,cluster态虽然不是最大的纠缠态,但是有比最大纠缠态更强健的性质,通信者Alice通过添加辅助粒子,并对量子态进行五粒子联合测量,Bob(Charlie)对手中的粒子进行单粒子测量,并把结果和恢复量子态需要进行的操作告知Charlie(Bob),Charlie(Bob)按照从Bob(Charlie)处得到的信息对手中的粒子进行相应的操作,最后再根据需要,把量子态通过相应的量子线路得到所需要共享的量子态。安全性分析证明此方案是安全的。The four-particle cluster state as the quantum channel was proposed to achieve the AT-qubit secret sharing.The cluster state is non-maximally entangled state,but it is stronger than the maximally entangled state.The correspondent Alice adds auxiliary particle to measure the five particles with joint measurement.Bob（Charlie） uses the single particle on the received particles,and sends the results and corresponding operation of recovering quantum state to Charlie（Bob）.According to the information from Bob（Charlie）,some corresponding operations on the particles were carried out by Chaxlie（Bob）,making the quantum states with the quantum circuit according to the need of sharing states.The security of the scheme was demonstrated.

关 键 词：量子光学 秘密共享 cluster态 纠缠态 联合测量 幺正变换 量子线路 

分 类 号：O431.2[机械工程—光学工程]