Overview

• State media and SCMP report that China is producing a four-channel, ultra‑low‑noise single‑photon detector, dubbed the photon catcher, developed by the Quantum Information Engineering Technology Research Centre in Anhui.
• China’s Science and Technology Daily cites 90% noise reduction and operation near −120°C, with researchers claiming multi‑wavelength scanning, low power use, and a package reportedly one‑ninth the size of some single‑channel products.
• Backers say the detector can sense individual photons and could support quantum radar and quantum communications, with the technology described as in service at leading Chinese institutions.
• Independent studies by RAND, the Mitchell Institute, and others note unresolved hurdles for photon‑sensing quantum radar, including cryogenic cooling, fragile entanglement, limited range beyond roughly 10 km, and long integration times.
• Analysts add that any eventual utility would likely come from plugging such nodes into layered sensor networks alongside existing Chinese counter‑stealth assets such as Yaogan‑41 optical satellites and VHF ground radars.