量子隐形传态的类簇态信道方案(英文)

提出了利用一个四粒子类簇态来实现一个任意两粒子态的隐形传送方案.如果接受者能根据发送者提供的测量信息对量子态实施一个合适的幺正变换,那么隐形传送就能以一定的概率实现.由于该方案中充当量子信道的是部分纠缠态,因此该方案比以前基于最大纠缠态的方案更具有现实意义.同时研究导出一个重要的结论:可以从一个四粒子类簇态(部分纠缠态)中以一定的概率提取出一个四粒子簇态(最大纠缠态),这个概率等于成功隐形传态的概率.

Quantum Teleportation with Linear Cluster-class States

A scheme for teleportation of an arbitrary two-qubit state using a four-qubit linear cluster-class state is proposed. Quantum teleportation can be successfully realized with a certain probability if the receiver can adopt an appropriate collective unitary transformation after receiving the sender′s Bell-state measurement information. The scheme is more practical than previous ones using maximally entangled states as the quantum channel. In addition, an important conclusion is obtained from the above scheme that a maximally four-qubit entangled state (cluster state) is extracted from a single copy of the cluster-class state with the same probability as the teleportation.