n-粒子赤道态的受控远程制备  

Controlled remote preparation of n-qubit equatorial states

作　　者：彭家寅[1] PENG Jia-yin(School of Mathematics and Information Science,Neijiang Normal University,Neijiang 641100,Sichuan,China)

机构地区：[1]内江师范学院数学与信息科学学院,四川内江641100

出　　处：《山东大学学报（理学版）》2020年第7期46-54,共9页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(11671284);四川省教育厅科研创新团队基金资助项目(15TD002)。

摘　　要：为了解决多量子态的制备问题,首先提出一种构造2n+1-量子纠缠态的方法,并给出其量子线路图。其次,采用2n+1-量子纠缠态为信道,出来远程制备一个任意n-量子赤道纠缠态的方案。该方案在控制者Charlie的协助下,Alice通过多量子投影测量和经典通信,Bob采用简单酉变换就能以100%的概率成功重构任意n-量子赤道态。进一步,通过任意二量子态和任意三量子态的制备的具体实例,说明了上述关于一般多量子赤道纠缠态远程制备协议是可行的。In order to solve the problem of preparing multi-particle states,a method of constructing 2n+1-qubit entangled quantum states is proposed,and its quantum circuit diagram is given.Secondly,a controlled remote preparation protocol for an arbitrary n-qubit equatorial entangled state is proposed by using this 2n+1-qubit entangled states as quantum channel.The protocol shows that under the control of the supervisor Charlie,and Alice uses multi-qubut projection measurement and classical communication,Bob can successfully reconstruct an arbitrary n-qubit equatorial state with 100%probability by using a simple unitary transformation.Furthermore,the feasibility of this protocol for remote preparation of the general multi-qubit equatorial entangled state is explicitly demonstrated by concrete examples of the preparation of arbitrary two-qubit state and arbitrary three-qubit state.

关 键 词：量子通信 受控远程态制备 多量子纠缠信道 任意赤道态 

分 类 号：O431.2[机械工程—光学工程] TP301[理学—光学]