In China, work is underway to develop a quantum radar to monitor deep space. This device will be able to detect asteroids and other objects, such as space debris, that may pose a threat to Earth. The radar will use individual particles instead of waves and operate at extremely low temperatures. This project is part of China’s planetary defense system and is being led by scientist Zuo Tao and a group of experts from the 38th Research Institute of China Electronics Technology Group Corporation.
The quantum radar uses a technique that can separate artificial microwave particles from the natural noisy background to generate an image of the previously invisible target. Unlike traditional radars, which require more powerful microwaves as the target moves away, quantum radar treats the signal as individual particles to obtain useful information from extremely weak microwaves.
The quantum radar design has a long range and high sensitivity, with a range that would reach up to 15 million kilometers. Quantum radars are already used in China to detect stealth aircraft and for other military purposes. The scientific community considers entanglement to be an important step in identifying a returned signal in the midst of strong background noise.