Quantum Spectrum Sensing Systems

A system comprising:

• a first comb generator configured to output a first frequency comb signal;
• a second comb generator configured to generate a second frequency comb signal;
• a frequency separator configured to select frequency components of the second frequency comb signal;
• one or more frequency shifters configured to alter the selected frequency components toward one or more Rydberg states of a vapor;
• a vapor cell sensor comprising the vapor and configured to produce output optical signals based on interactions of the vapor with the first frequency comb signal and the altered frequency components of the second frequency comb signal;
• and
• an optical detector configured to detect the output optical signals.

A method comprising:

• generating a first frequency comb signal;
• generating a second frequency comb signal;
• selecting frequency components from the second frequency comb signal;
• altering the selected frequency components toward one or more Rydberg states of a vapor;
• receiving, at a vapor cell sensor comprising the vapor, input optical signals based on the first frequency comb signal and the altered one or more selected frequency components of the second frequency comb signal through;
• and
• detecting output optical signals from the vapor cell sensor, the output optical signals generated based on interactions of the vapor and the input optical signals in the presence of electromagnetic radiation from an external source.