一种类型的未知三粒子GHZ态的辅助概率克隆(英文)

Assisted cloning of a class of unknown three-qubit GHZ state

基于三个二粒子纠缠态作为量子信道,提出了一种类型的未知三粒子GHZ态或其正交态的概率克隆方案。该方案中,当量子信道是最大纠缠态时,通过普通的量子隐形传输过程,Bob(态的接收者)能够在其粒子上重建未知态。在Victor(态的制备者)的帮助下,Alice(态的发送方)可以一定的概率获得未知态或其正交态。随后的方案中,讨论了量子信道是非最大纠缠态时量子隐形传输的过程,在这种情况下,Bob可以一定的概率接收Alice想要传输的态,由于此过程也需要Alice进行贝尔测量,所以在随后的克隆过程中,Alice在态的制备者的帮助下同样能以一定的概率获得未知态或其正交态。

A protocol for probabilistic cloning of a class of three-qubit Greenberger-Horne-Zeilinger （GHZ） state and its orthogonal complement state by using three maximally two-qubit entangled states as the quantum channel is proposed. In this protocol, Bob （the state receiver） can receive the unknown state via usual teleportation process. With the assistance of Victor （the state preparer）, Alice（the state sender） can produce the perfect copies and complement copies of an unknown state. A protocol for the teleportation is given by using non-maximally entangled states as quantum channel, and the clones and complement clones of unknown state also can be obtained by Alice with assistance offered by the state preparer.