基于SSA-BP网络模型的Hong-Ou-Mandel干涉时延测量研究及其在量子陀螺仪中的应用  

SSA-BP network model based Hong-Ou-Mandel interference delay measurement and its application in quantum gyroscope

作　　者：翟艺伟 李旺 Zhai Yi-Wei;Li Wang(School of Electrical and Control Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学电气与控制工程学院,西安710021

出　　处：《物理学报》2023年第13期245-251,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12205178)资助的课题。

摘　　要：作为航空航天导航系统的重要器件,高灵敏度的光学陀螺仪一直是国内外科研工作者的研究重点.经典光学陀螺仪因真空零点波动使其灵敏度受到散粒噪声极限的制约,无法满足日益发展的量子导航需求.本文提出了基于频率纠缠源及Hong-Ou-Mandel(HOM)干涉的量子陀螺仪方案,利用SSA-BP神经网络模型模拟不同的泵浦光和非线性晶体参数,以预测HOM干涉图谱的特性参量干涉可见度及干涉宽度.结合量子Fisher信息理论,获得时延差的最大量子Fisher信息可达1.999,计算得出时延差的不确定度与散粒噪声极限的最小比值为0.707,并依据量子陀螺仪时延差与旋转角速度的关系,验证出旋转角速度的测量灵敏度较经典光学陀螺仪提高了2个数量级.证明上述方案可以实现超越散粒噪声极限的测量灵敏度,能为后续量子陀螺仪的实验验证提供理论支持.High aenoitivity optical gyrocopea,no an important component of neroepace navigation oyetem,have become a research hotopot.The oenoitivity of the elasrical optical gyroscope io restricted by the shot noise-limit owing to the vaouum zero energy fluotuation.Therefore,the clascical optical gyrosope cannot meet the growing demand of navigation,senoing and communication.In this work,a measurement scheme of quantum gyroacope bnsed on frequency entangled source and Hong-Ou-Mandel(HOM)interference io proposed.In order to realize high-precicion delay meaourement,the interference viaibility and width of HOM interferogram are regulated by changing the bandwidth of pump lnser and the length of nonlinear cryatal.However,traditional experimental regulation method io inefficient and time consuming.On the baaio of the above scheme,a delay meaurement scheme of HOM interference based on SSA-BP network is eatabliahed.The SSA-BP network is uoed to aimulate different bandwidthe of pump lacer and the lengtho of nonlinear eryotal to predict the interference vioibility and width of HOM interferogram.The verification reculto ahow that the mean oquare error(MSE),the mean absolute error(MAE)and the mean absolute percentage error(MAPE)predicted by SSA-BP network are smallest.Based on the above SSA-BP network model,the interference visibility and width of HOM interferogram areσ=1 andσ=5.9 ps reapectively.Combined with quantum Fisher information,the maximum value of F io obtained to be 1.999.Meanwhile,according to the Cramer-Rao bound theory,the minimum ratio of the uncertainty of the delay to the chot-noise-limit can reach 0.707,indicating that the|precision of delay measurement is incrensed by 2 ordere of magnitude.According to the relationohip between delay and rotational angular velocity,the meaourement sensitivity of the rotational angular velocity io improved by 2 ordero of magnitude compared with that of the claosical optical gyroacope.These reoults prove that the above quantum gyrocope scheme can realize the menourement oenoitivity

关 键 词：Hong-Ou-Mandel干涉 时延测量 量子陀螺仪 麻雀搜索算法 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] V249.3[自动化与计算机技术—控制科学与工程] V448[航空宇航科学与技术—飞行器设计]