China has announced the production of a quantum radar detector, Photon Catcher. The device can easily detect stealth fighter jets. The most vulnerable target could be the American F-22, widely regarded as the world’s stealthiest aircraft. China has announced the production of a quantum radar detector, Photon Catcher. The device can easily detect stealth fighter jets. The most vulnerable target could be the American F-22, widely regarded as the world’s stealthiest aircraft.