Fluorescence detection at the atom shot noise limit for atom interferometry

TL;DR

This paper reviews and analyzes fluorescence detection methods for atom interferometers, demonstrating that simultaneous fluorescence detection with a CCD sensor can reach the atom shot noise limit under typical operating conditions.

Contribution

It provides a theoretical analysis of detection noise sources and identifies optimal laser parameters for achieving shot noise limited detection in atom interferometry.

Findings

Simultaneous fluorescence detection with CCD is optimal for shot noise limit.

Laser parameters like detuning, intensity, and duration are critical for reaching shot noise limit.

Theoretical analysis of noise sources guides the design of high-sensitivity atom interferometers.

Abstract

Atom interferometers are promising tools for precision measurement with applications ranging from geophysical exploration to tests of the equivalence principle of general relativity, or the detection of gravitational waves. Their optimal sensitivity is ultimately limited by their detection noise. We review resonant and near-resonant methods to detect the atom number of the interferometer outputs and we theoretically analyze the relative influence of various scheme dependent noise sources and the technical challenges affecting the detection. We show that for the typical conditions under which an atom interferometer operates, simultaneous fluorescence detection with a CCD sensor is the optimal imaging scheme. We extract the laser beam parameters such as detuning, intensity, and duration, required for reaching the atom shot noise limit.