基于非最大纠缠的五粒子Cluster态的高效量子态共享方案

摘要

In this paper we present a new scheme for quantum state sharing of an arbitrary unknown two-qubit state by using a non-maximally five-qubit cluster state as quantum channel. In this scheme, the non-maximally five-qubit cluster state is shared by a sender (Alice), a controller (Charlie), and a receiver (Bob), who does not need to introduce an auxiliary particle but only operates an appropriate unitary transformation. The sender introduces an auxiliary particle and makes orthogonal complete bases measurement, and the controller makes a single-particle projective measurement on his particle, then the quantum state sharing can be probabilistically realized.%本文提出了一个新的未知量子态共享方案，使用一个非最大纠缠的五粒子Cluster态作为量子通道来实现任意两粒子未知量子态的共享。即就是发送方(Alice)，接收方(Bob)和控制方(Charlie)共享一个非最大纠缠的五粒子Cluster态。与以前传统方案不同，在本方案中发送方引入一个辅助粒子，并对其手中的粒子进行正交完备基测量，而接收方不需要引入辅助粒子，只需要执行适当的幺正操作，即可以方便的完成信息的顺利接收。控制方通过对自己手中的粒子做单粒子投影测量来控制和协助通信双方，使得任意两粒子的未知量子态共享方案得以成功实现。