Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 38: Poster IV

Q 38.18: Poster

Wednesday, March 13, 2024, 17:00–19:00, KG I Foyer

Rydberg Atom-based RF Sensors: E-field amplitude and phase-sensitive detection — •Clara Roth, Matthias Schmidt, Lara Metzger, Stephanie Bohaichuk, Chang Liu, Florian Christaller, Vijin Venu, Harald Kübler, and James Shaffer — Quantum Valley Ideas Laboratory, Waterloo, Canada, ON

We present theoretical work aimed at understanding radio frequency phase and amplitude measurement using all-optical, atom-based electric field sensors. Atom-based radio frequency field sensors have a number of applications in communications, radar and test and measurement where both phase and amplitude information are important. We apply the weak probe approximation to the Lindblad-master equation and find analytic expressions for the density matrix in steady state in several level schemes up to 5 levels where a closed loop is formed. We focus especially on the absorption coefficient and the populations of Rydberg states. With these expressions, we gain a deeper understanding of the multi-photon interference and how this applies to phase and amplitude readout in atom-based radio frequency sensors.

Keywords: Rydberg atoms; microwave sensing; electromagnetically induced transparency; thermal vapor