A company claims to have created a quantum radar that can detect stealth aircraft and see through the radar jamming used to hide warplanes.

Defence giant China Electronics Technology Group Corporation displayed the prototype at the Zhuhai air show last week.

Stealth aircraft avoid detection by redirecting most of a radar system’s radio waves, which usually reflect off their surface and reveal their location.

In theory, a quantum radar can overcome this by using two streams of entangled photons . These are pairs of photons that have a weird connection so a change to one …