利用三粒子W态隐形传送三粒子GHZ态

提出一个三粒子GHZ(Greenberger-Horne-Zeilinger)态从发送者传送给两个接收者中任意一个的量子隐形传送方案。此方案用两个三粒子W态作为量子信道。若发送者进行两次贝尔态测量和阿达码门操作,想得到所需传送的三粒子GHZ态的接收者引进一个辅助粒子,进行控制-非操作,同时根据另一个接收者的测量结果实施一个适当的幺正变换操作,可以一定的概率成功地隐形传送三粒子GHZ态。同时,此方案可推广至隐形传送n粒子GHZ态,这时也只需用两个三粒子W态作为量子信道,但这时想得到所需传送的n粒子GHZ态的接收者需引进(n-2)个辅助粒子,进行(n-2)次控制非操作,同时根据另一个接收者的测量结果实施一个适当的幺正变换操作,可以一定的概率成功地隐形传送n粒子GHZ态。

Teleportation of a Three-Particle GHZ State Via Three-Particle W States

A scheme for teleporting a three-particle Greenberger-Horne-Zeilinger(GHZ) state from a sender to either of the two receivers is proposed,where the quantum channel is composed of two three-particle W states.The results show that,for such a maximally entangled quantum channel,there is still a certain probability of successful teleportation if the sender performs two generalized Bell-state measurements and Hadamard operation while either of the two receivers performs the controlled-not operation and introduces an appropriate unitary transformation with the help of the other(receiver's) suitable measurements and classical information.The present scheme may be directly generalized to teleport an unknown n-particle GHZ state from a sender to either of the two receivers by introducing n-2 ancillary particles and performing n-2 controlled-not operations with the n-2 auxiliary particles as the target bit.