2种量子测量方案对非最大纠缠相干态隐形传态平均保真度的影响

摘要

在纠缠相干态的隐形传态过程中，使用双模光子数测量和奇偶态测量2种粒子数测量方案，得到的平均保真度存在较大差异。据此对使用非最大纠缠相干态作为量子信道时，2种测量方法得到的平均保真度进行了对比。结果显示：相较于双光子数测量，用奇偶态粒子数测量方案时，隐形传态的平均保重度有了较大提高。%In the teleportation of entangled coherent states,by using two mode photon number measurement or even-odd state measurement,the average fidelity is quite a difference. The average fidelity of two methods is compared in non-maximum entangled coherent states as quantum channel. Results show that the average fidelity of the teleporta-tion is greatly improved when the number of odd and odd particles is measured with the double photon number measurement.