❗️Quantum sensors could expose tunnels hidden underground

In 2022, a British team working under a UK Ministry of Defence contract used a quantum gravity sensor to detect a tunnel buried about 2 metres underground.

The technology measures tiny changes in gravity caused by underground structures. By comparing two clouds of ultracold rubidium atoms, it can help filter out vibrations that traditionally make gravity sensing difficult.

Hamas’s tunnels in Gaza reportedly reach depths of 20–70 metres, far beyond the publicly demonstrated capability.

Now, British startup Delta.g is developing portable quantum gravity sensors, while the Pentagon’s Farseer programme is targeting sensors that operate from vehicles, ships and aircraft.

The goal is to detect underground infrastructure without sending people below ground. The technology is advancing, but detecting deep tunnels from the surface remains an unsolved challenge.

@futurism 🧬