基于GHZ纠缠态实现纯EPR对的双向量子隐形传态

Bidirectional quantum teleportation of a pure EPR state based on GHZ entangled state

提出了一种基于Greenberger-Horne-Zeilinger(GHZ)纠缠态进行纯EPR对双向隐形传态的方案.通过使用纠缠交换技术,通信双方Alice和Bob共享两对三粒子GHZ纠缠态来构建量子信道.方案中通过使用受控非门操作,单量子位测量以及适当的幺正操作,通信双方可以同时发送一个纯EPR对给对方.故相比仅可以传送单一量子态的方案更经济.

A scheme for bidirectional quantum teleportation （BQT） of a pure EPR state based on Greenberger - Home- Zeilinger（GHZ） entangled state was proposed. By using the entanglement swapping technique , Alice and Bob shared two pairs of three - particle GHZ entangled states to construct quantum channel. Also by using a controlled- not operation, single -qubit measurement, and appropriate unitary operation in the scheme, two sides of communication can simultaneously transmit a pure EPR pair to each other. Therefore, the proposed scheme is economical compared to a scheme that can only transmit a single quantum state.