Optimal strategies for low-noise detection of atoms using resonant frequency modulation spectroscopy in cold atom interferometers

• URL: http://arxiv.org/abs/2408.06575v1
• Date: Tue, 13 Aug 2024 02:23:25 GMT
• Title: Optimal strategies for low-noise detection of atoms using resonant frequency modulation spectroscopy in cold atom interferometers
• Authors: Ryan J. Thomas, Samuel R. Legge, Simon A. Haine, John D. Close,
• Abstract summary: Resonant frequency modulation spectroscopy has been used as a highly-sensitive method for measuring the output of cold-atom interferometers. We compare this technique to the standard method of fluorescence imaging and find that it outperforms fluorescence imaging for compact interferometers using condensed atomic sources. However, we find that fluorescence imaging is likely to be the preferred method when using squeezed atomic sources due to limited atom number.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Resonant frequency modulation spectroscopy has been used as a highly-sensitive method for measuring the output of cold-atom interferometers. Using a detailed model that accounts for optical saturation, spatially-varying intensities and atomic densities, and radiation pressure on the atoms, we theoretically investigate under what parameter regimes the optimum signal-to-noise ratio is found under experimentally realistic conditions. We compare this technique to the standard method of fluorescence imaging and find that it outperforms fluorescence imaging for compact interferometers using condensed atomic sources or where the photon collection efficiency is limited. However, we find that fluorescence imaging is likely to be the preferred method when using squeezed atomic sources due to limited atom number.

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