一种生成质量最优路径纠缠微波信号的压缩参量选择方法

发布时间：2019-05-20 03:26

【摘要】：介绍了路径纠缠微波及其生成原理,将生成信号以量子力学算符的形式表示,并在光子数态表象下展开,定性地给出了生成信号与压缩参量之间的关系.提出了一种路径纠缠微波信号质量评价方法,即通过信号中纠缠微波光子总数的期望值表征信号的纠缠度,间接实现对信号质量的评价.基于这种信号质量评价方法,提出了一种生成质量最优路径纠缠微波信号的压缩参量选取方法:在近似确定有效纠缠微波光子数的前提下,找出生成不同微波光子数纠缠概率最大时的一组压缩参量值,进而得出各个压缩参量值所对应的一组纠缠微波光子总数的期望值,其中的最大值对应的压缩参量值即为生成质量最优信号所要选择的压缩参量值.通过理论分析,发现路径纠缠微波信号质量由压缩参量决定,且只与压缩幅有关,而与压缩角无关.仿真实验结果表明,在纠缠微波光子数的最大有效值取为"26"时,纠缠微波光子总数期望值的最大值对应的压缩幅值为1.77,即压缩幅取此值时所得到的路径纠缠微波信号质量最佳,仿真结果表明该方法是有效的.本文的研究为路径纠缠微波在实验研究和实际应用中如何生成高质量信号的问题提供了思路.
[Abstract]:In this paper, the path entangled microwave and its generation principle are introduced. the generated signal is expressed in the form of quantum mechanics operator and expanded under the photonic number state representation. The relationship between the generated signal and the compression parameters is given qualitatively. In this paper, a method for evaluating the quality of path entangled microwave signals is proposed, that is, the entanglement degree of the signal is represented by the expected value of the total number of entangled microwave photons in the signal, and the evaluation of the signal quality is indirectly realized. Based on this signal quality evaluation method, a compression parameter selection method for generating quality optimal path entangled microwave signals is proposed: on the premise of approximately determining the number of effective entangled microwave photons, A set of compression parameter values with the highest entanglement probability of different microwave photons are found out, and then the expected values of the total number of entangled microwave photons corresponding to the values of each compression parameter are obtained. The compression parameter value corresponding to the maximum value is the compression parameter value to be selected to generate the quality optimal signal. Through theoretical analysis, it is found that the quality of path entangled microwave signal is determined by compression parameters, which is only related to compression amplitude, but independent of compression angle. The simulation results show that when the maximum effective value of the number of entangled microwave photons is "26", the maximum expected value of the total number of entangled microwave photons corresponds to the compression amplitude of 1.77. That is, when the compression amplitude takes this value, the quality of the path entangled microwave signal is the best, and the simulation results show that the method is effective. The research in this paper provides an idea for how to generate high quality signals in experimental research and practical application of path entangled microwave.
【作者单位】：空军工程大学信息与导航学院;
【基金】：国家自然科学基金(批准号:61573372)资助的课题~~
【分类号】：TN015

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