Effects of losses in the hybrid atom-light interferometer

TL;DR

This paper investigates how losses and decoherence affect the phase sensitivity and signal-to-noise ratio in a hybrid atom-light interferometer based on Raman scattering, comparing homodyne and intensity detection methods.

Contribution

It provides a numerical analysis of phase sensitivities and SNRs in a hybrid interferometer considering realistic loss and decoherence effects, highlighting differences between detection methods.

Findings

Loss and decoherence reduce measurement precision.

Homodyne and intensity detection methods show different sensitivities.

Intermode decorrelation is crucial for optimal performance.

Abstract

Enhanced Raman scattering can be obtained by injecting a seeded light field which is correlated with the initially prepared collective atomic excitation. This Raman amplification process can be used to realize atom-light hybrid interferometer. We numerically calculate the phase sensitivities and the signal-to-noise ratios of this interferometer with the method of homodyne detection and intensity detection, and give their differences between this two methods. In the presence of loss of light field and atomic decoherence the measure precision will be reduced which can be explained by the break of the intermode decorrelation conditions of output modes