基于部分记忆信道的量子隐形传态保真度增强方法研究  

Enhancement of Quantum Teleportation Fidelity Based on Partial Memory Channel

作　　者：武天雄 李云霞[1] 蒙文[1] 王俊辉 魏家华[1] 唐杰 Wu Tianxiong;Li Yunxia;Meng Wen;Wang Junhui;Wei Jiahua;Tang Jie(Information and Navigation College,Air Force Engineering University,Xi'an,Shaanxi 710000,China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710000

出　　处：《激光与光电子学进展》2021年第5期258-263,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61971436,61803382);中国博士后科学基金资助项目(2018M643869);陕西省自然科学基础研究计划(2018JQ6020)。

摘　　要：量子保真度是量子隐形传态协议的重要评价参数之一,可用于衡量传输初始态与输出态的相似程度。提出了一种利用部分记忆信道提高泡利噪声信道下隐形传态保真度的方法。依据不同的泡利信道噪声参数,具体分析了比特翻转噪声、xz退相位噪声和双泡利噪声三种情况下的平均保真度。通过构造量子隐形传态方案的量子逻辑线路图,分析了量子保真度与噪声参数的关系。针对噪声影响下的隐形传态过程,引入了部分记忆信道,并对部分记忆信道参数进行了分析。结果表明,部分记忆信道可有效提高泡利噪声影响下量子隐形传态协议的保真度。Quantum fidelity is one of the most important evaluation parameters in quantum teleportation protocols and can be used to evaluate the similarity between the initial state and the output state.Here,we propose one method to improve the teleportation fidelity in channels with Pauli noise based on a partial memory channel.According to the different parameters of Pauli noise,the average fidelity under three cases of bit-flip noise,xz dephasing noise,and two-Pauli noise is analyzed in detail.We construct the quantum logic circuit of a quantum teleportation scheme and analyze the relationship between quantum fidelity and noise parameters.In addition,as for the teleportation process under the effect of noise,the partial memory channel is introduced and the parameters of the partial memory channel are analyzed.The results show that the partial memory channel can effectively enhance the quantum teleportation fidelity under the influence of Pauli noise.

关 键 词：量子光学 量子通信 量子隐形传态 BELL态 量子保真度 泡利噪声 记忆信道 

分 类 号：O431.2[机械工程—光学工程]