Scientists create quantum sensor that covers entire radio frequency spectrum (phys.org)

Atoms in a glass vapor cell are excited with laser beams to Rydberg states. They detect the electric fields and imprint the information back onto the laser beams.

A quantum sensor could give Soldiers a way to detect communication signals over the entire radio frequency spectrum, from 0 to 100 GHz, said researchers from the Army. Such wide spectral coverage by a single antenna is impossible with a traditional receiver system, and would require multiple systems of individual antennas, amplifiers and other components.

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