利用四维的二粒子纠缠态传送一个未知的二维二粒子量子态

Teleportation of an arbitrary two-qubit state via an entangled four-dimensional qudit pair channel

利用四维的二粒子最大纠缠态作为量子信道可成功地传送一个未知的二维二粒子量子态,其成功几率及态的保真度均为100%。若量子信道为部分纠缠态,也可以几率传送此量子态,其成功几率由部分纠缠态的最小Schm idt系数决定,态的保真度为100%。

In this study, we will investigate the problem of teleportation of an arbitrary two-qubit state. Firstly, we show how the two-qubit state can be teleported with unit fidelity and unit probability by using a maximally entangled four-dimensional qudit pair as a quantum channel. Then, we put forward a scheme for probabilistic teleporting the state with unit fidelity via a partially entangled quantum qudit channel. The probability of successful teleportation is determined by the smallest Schmidt coefficient of the entangled qudit pair.