A new sensor that can detect the entire radio spectrum could play a big role in the future of electromagnetic warfare and communications.
In January, David Meyer, Paul Kunz, and Kevin Cox with the Army Research Lab published a new paper describing how they used atoms in a quantum state called a Rydberg state to detect electromagnetic emissions up to 20 GHz. That includes the frequencies that carry Bluetooth, WiFi, and other communication methods

Cox said these applications take advantage of a different aspect of quantum science that he called “identicalness.”




Army Creates Quantum Sensor That Detects Entire Radio-Frequency Spectrum - Defense One