利用四粒子部分纠缠态实现二粒子未知态的概率受控量子传递

Controlled Teleportation of Unknown Two-particle State Based on Four-Particle Partly Entangled State

提出了一个二粒子未知态受控量子隐形传递的方案,以四粒子部分纠缠态作为量子信道,应用其中的一个粒子作为控制粒子.在传递者和控制者进行了一系列的测量之后,根据他们的测量结果,接收者通过做适当的幺正变换和对辅助量子位的测量,就能以一定的概率得到待传递的量子态.

We propose a scheme for controlled teleportation of a unknown two-particle state using a four-particle partly entangled state as a quantum channel and one of these particles works as the controlling particle. The sender and the controller perform a series of measurements on their own particles respectively and send their results to the receiver. According to the meassurement results, the receiver will get the state sent by sender with certain probability by doing proper unitary transformations and measurements on an auxiliary particle.