基于4粒子纠缠态的未知3粒子态概率量子隐形传态  

Probabilistic teleportation of an unknown three-particle state via a four-qubit entangled state

作　　者：王妍妍[1] 王景燕[1] 侯奎[2] 史守华[1,3] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230039 [2]安徽建筑工业学院数理系,安徽合肥230601 [3]安徽文达信息工程学院院长办公室,安徽合肥231201

出　　处：《安徽大学学报（自然科学版）》2012年第4期48-52,共5页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省教育厅优秀青年人才自然科学基金重点项目资助(2012SQRL136ZD)

摘　　要：使用4粒子纠缠态作为量子信道,在对4粒子纠缠态的纠缠系数方面并没有做确切要求的前提下,完成了未知3粒子纠缠态的隐形传态.在传输过程中,发送方对2对粒子进行Bell测量并公布结果,然后再对4粒子中的一个粒子作Hadamard操作之后,也对其进行测量,且将测量结果通过经典信道公布.接收方引进2个辅助粒子并实施一次控制非操作,再进行一组适当的幺正变换,便可实现未知3粒子纠缠态的概率量子隐形传态.By using a four-qubit non-maximally entangled state as quantum channel, under the condition of whose coefficients were unknown, a scheme of an unknown three-partical state＇s teleportation was proposed. In the process of transmission the sender performed Bell state measurements to two pairs of particles and released finding, then completed a quantum controlled Hadamard gate operation and Bell state measurement to one of four particles, finally released finding via classical channel. By introducing two ancillary qubits, adopting a Controlled-Not gate and constructing a unitary transformation properly, the probabilistic teleportation of three- particle entangled state could be accomplished.

关 键 词：量子信道 隐形传态 纠缠态 幺正变换 BELL态测量 

分 类 号：O431[机械工程—光学工程]