利用广义Bell态信道联合远程制备一个任意三量子比特态

研究了一个联合远程制备任意三量子比特态的方案。该方案利用广义的Bell态作为量子信道,两个发送者分别选择合适的测量基进行测量,然后利用经典信道把测量结果传送出去,接收者根据测量结果对自己手中的粒子采取适当的幺正操作,然后引入辅助粒子并进行选择性测量,就能概率性的得到想要制备的量子态。研究结果表明:利用不同形式的广义Bell态信道成功实现联合远程制备一个任意三量子比特态的概率是一样的,当量子信道处于最大纠缠态时,可以得到最大的成功概率。

Joint Remote Preparation of an Arbitrary Three-qubit State Via Generalized Bell States Channel

In this paper, a scheme for realizing a joint remote preparation of an arbitrary three-qubit state is researched. The scheme adopts generalized Bell states as quantum channels, each preparer measures his/her qubits in an appropriate basis and broadcasts through a public classical communication channel the measurement outcome based on which the receiver carries out necessary actions. By introducing an auxiliary particle and making selective measurement on it, the receiver can reconstruct the desired state with probability less than unity. The result shows that by using different type of generalized Bell states channel, the probability of joint remote preparation of an arbitrary three-qubit state is the same. While the generalized Bell states channel is maximally entangled, the joint remote preparation obtains the maximall total success probability.