量子多结构分组纠缠到达时间测量增强方法  

Enhancement of the Time of Arrival Measuring by Utilizing Multi-Structured Grouped-Entangled Quantum Pulse

作　　者：杨春燕[1] 吴德伟[1] 余永林[1] 张豪[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《北京邮电大学学报》2011年第6期33-37,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家博士后科学基金项目(20090461466);空军工程大学电讯工程学院科研创新基金项目(DYCX1003)

摘　　要：针对在非理想信道中,采用完全纠缠量子脉冲进行到达时间测量时,测量精度与稳健性存在的矛盾,提出了多结构分组纠缠的测量方法.将总的量子脉冲分成不同的小组,小组中采用频率纠缠脉冲,再将这些小组合并成更大的分组,分组与分组之间再进行纠缠,该方法综合考虑了纠缠度、量子传输效率与测量精度之间的关系.仿真结果表明,特定量子传输效率的条件下,通过构建合理的纠缠分组结构和选择合适的纠缠度,可使到达时间测量精度增益达到最优.In order to solve the time of arrival measuring between the accuracy and the robustness utilizing the maximal entangled quantum pulse in a non-ideal transmission channel, a new multi-structure of quantum entanglement utilizing grouped photons is presented. The total quantum pulses are divided into different subgroups with each of these subgroups containing frequency entangled photons. The subgroup is composed of larger groups and entangles each other. In the proposed scheme, the relationship among the degree of entanglement, quantum transmission efficiency and the measurement precision is considered. Simulations show that the maximum accuracy gain of the measurement can be obtained through the selection of a proper quantum entangle structure and the optimal degree of entanglement under the conditioning of the specific quantum transmission efficiency.

关 键 词：量子定位系统 到达时间测量 量子纠缠 分组纠缠 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]