ORIGINAL: tomrlutong2
Does anyone have insight into the recent reports of Chinese "quantum radar"? I can't post links yet, but just google that to see the stories.
I'm by no means an expert, but the coverage has been basically technobabble. The only credible paper I've been able to find concludes that quantum radar can to 3dB better than conventional. That's not nothing, but hardly the game changer the news reports claim.
Only by few comments, because we still don't know both appearance and principle of the quantum radar. Only in theories on both US and China.
A quantum radar device could detect microwave reflections that would normally be swamped by the noisy background radiation. It would contain two devices capable of interconverting visible light with microwaves, a capability that exists with current technology. First the top converter couples two entangled beams, a microwave one (red wavy line) and a visible one (red straight line); then the microwave reflection is converted to visible light that interferes with the initial visible beam in the detector.
Here is the US publication in 2012:
https://www.phys.org/news/2012-12-quant ... radar.html
And the latest report about the development of Chinese QR, maybe this link is what you are referred:
http://www.nextbigfuture.com/2017/02/mo ... hinas.html
Is it still unimpressed by the military, or just straight up propaganda? We still cannot judge anything about QR in short years yet.
