新型量子雷达中的光源研究

Research on light source in new quantum radar

近期提出的新型量子雷达利用纠缠光子的量子纠缠效应实现三维量子增强,对该新型量子雷达方案中的光源进行了初步分析,并讨论了其可能实现的方案。新型量子雷达方案中的光源在频率和动量上都是正相关的。以两光子态为例,首先对单独考虑频率或动量正相关态的制备进行了研究,并在此基础上进一步讨论了频率和动量都正相关的纠缠光子源的制备。数值模拟结果表明,利用强聚焦下的脉冲抽运光,通过自发参量下转换过程可以制备频率和动量都正相关的纠缠光子源。

The light source mentioned in recent quantum radar scheme,in which the quantum entanglement effect of entangled photons is used to realize three-dimensional quantum enhancement,has been analyzed and the possible solution is also discussed.In the new quantum radar scheme,positive correlation in frequency and transverse momentum can be used to realize three-dimensional quantum enhancement.Taking two-photon states as an example,firstly,preparation of the positively correlated state of frequency or momentum is investigated separately,and then on this basis,the preparation of entangled photon sources with positive correlation of both frequency and momentum is further discussed.Numerical simulation shows that through a spontaneous parametric down conversion process,the entangled photon source with positive correlation in frequency and transverse momentum can be generated by using a tightly focused pulsed pump light.