Miao Qiang, Wu Dewei
Laboratory of Advanced Navigation Technology, Information and Navigation College, Air Force Engineering University, Xi'an 710049, China.
Sensors (Basel). 2024 Dec 2;24(23):7712. doi: 10.3390/s24237712.
Microwaves exhibit superior performance in free-space transmission compared to optical waves, primarily due to their ability to penetrate fog and experience lower losses in the Earth's atmosphere. Based on microwave-optical entanglement prepared by nano-cavity electro-opto-mechanic converters, we propose a scheme of a quantum positioning system using the distance-based positioning method. Principles of microwave-optical entanglement preparation and our QPS scheme are introduced in detail. The entanglement feature, system stability and positioning feature of the scheme are analyzed after simulations. Furthermore, we delve into the impact of key parameters, such as transmissivity and photon conversion efficiency, on positioning. Notably, the entanglement degrees for both microwave-optic entanglement at the transmitter and optic-optic entanglement at the receiver surpass one, affirming the efficiency of the scheme in preparing and maintaining entanglement. When transmissivity in beam-splitter models of both ground stations equals 0.5, our scheme achieves a minimal positioning error of 6.4×10-7m2 under ideal conditions. Additionally, we map out traces of a plane through continuous positioning using our scheme. These results demonstrate the theoretical efficiency and robustness of our proposed approach.
与光波相比，微波在自由空间传输中表现出卓越的性能，这主要归功于其穿透雾气的能力以及在地球大气层中较低的损耗。基于纳米腔电光机械转换器制备的微波 - 光纠缠，我们提出了一种使用基于距离的定位方法的量子定位系统方案。详细介绍了微波 - 光纠缠制备原理和我们的量子定位系统方案。通过模拟分析了该方案的纠缠特性、系统稳定性和定位特性。此外，我们深入研究了诸如透射率和光子转换效率等关键参数对定位的影响。值得注意的是，发射器处的微波 - 光纠缠和接收器处的光 - 光纠缠的纠缠度均超过1，这证实了该方案在制备和维持纠缠方面的效率。当地面站的分束器模型中的透射率均为0.5时，我们的方案在理想条件下实现了6.4×10 - 7m2的最小定位误差。此外，我们使用我们的方案通过连续定位绘制了平面轨迹。这些结果证明了我们提出的方法在理论上的效率和稳健性。
