基于N个有序纠缠光子对的量子机密共享方案

提出了一种基于N个有序纠缠光子对量子机密共享方案.用纠缠光子作为信息的载体,密钥管理者Alice将纠缠光子对分成两个序列,其中一个序列直接发送给合作者之一Bob,在确保第一个序列发送安全后,再对第二个序列进行编码,发送给另一个合作者Charlie.Bob和Charlie分别对他们所接收到的光子序列进行Bell基联合测量,从而得到Alice所发布的密钥,完整密钥的获得需要管理者和所有合作者共同实现.本方案采用两体纠缠态,相对三体纠缠态来说,在实验上更容易实现,仅需要线性光学元件和简单的纠缠源.

Quantum Secret Sharing Scheme with N-ordered Entangled Photon pairs

A new quantum secret sharing scheme is proposed,based on N-ordered entangled photon pairs.Entangled photons are used as information carrier.Alice,the private key administrator,will divide the entangled photons into two sequences.One of the sequences will be sent to one of the partners Bob directly.After the safety of the first sequence ensured,the second sequence will be encoded and sent to another partner Charlie.Bob and Charlie will make Bell-based joint measurements with what they have received respectively,thus they obtain keys that Alice released.It needs the administrator and all the partners′ collaboration to get the whole information.Relative to there-particle entangled state,this scheme adopts two bodies entanglement,and can be experimentally realized easier.It only needs linear optical elements and simple entanglement source.