Noise spectroscopy in Rydberg atomic ensemble

TL;DR

This paper demonstrates a novel Rydberg spectroscopy method by converting phase noise into amplitude noise in cesium vapor, with experimental results and a proposed enhancement for microwave field detection.

Contribution

It introduces a new phase noise spectroscopy technique using Rydberg atoms and proposes a modulation-enhanced approach for microwave field measurements.

Findings

Experimental measurement of phase noise spectrum in Rydberg atoms

Validation of the sensitivity of the method to two-photon detuning

Proposal of a modulation-enhanced PNS approach for microwave detection

Abstract

The phase noise of incident light fields can be converted into amplitude noise via absorption and dispersion effects in media under electromagnetically induced transparency. The conversion process is sensitive to two-photon detuning. This effect can be used to perform a novel type of Rydberg spectroscopy. We present experimental measurements of the phase noise spectrum (PNS) with Rydberg atoms in a cesium vapor cell. Furthermore, to explore microwave field measurements, a modulation-enhanced PNS approach is proposed.