海森堡XXX模型热纠缠信道中的量子隐形传送(英文)

Teleportation via thermally entangled state of a two-qubit Heisenberg XXX chain

研究了以一维海森堡XXX链作为量子通道,实现了两粒子纯态的量子隐形传送.为了表明传输效果,给出了传输过程中的平均保真度.发现当外加磁场较低,并且温度T小于2Jkln5时,平均保真度大于经典通道的传输极限值2/3.

The teleportation of a two-qubit pure state through 1 D Heisenberg XXX chain as a quantum channel is investigated. To quantify the degree of the teleportation, we give the average fidelity of the transmission. When the temperature T is lower than the value of 2J/kln5 with lower external magnetic field B,we get the fidelity larger than 2/3 which is the limited value of any classical communication.