Quantum gravimetry in the same internal state using composite light Raman pulses

TL;DR

This paper presents a novel atomic gravimetric sequence using composite Raman pulses that enhances noise suppression and fringe visibility by exploiting specific Rabi frequencies, improving precision in quantum gravimetry.

Contribution

It introduces a new gravimetric scheme with composite light pulses that reduces external noise sensitivity and provides analytical insights into fringe formation.

Findings

Analytical expressions for interference fringes are derived.

Special Rabi frequencies improve fringe visibility.

The scheme suppresses common electromagnetic noise effects.

Abstract

We introduce an atomic gravimetric sequence using Raman-type composite light pulses that excites a superposition of two momentum states with the same internal level. The scheme allows the suppression of common noise, making it less sensitive to external fluctuations of electromagnetic fields. The Raman beams are generated with a fiber modulator and are capable of momentum transfer in opposite directions. We obtain analytical expressions for the interference fringes in terms of three perturbative parameters that characterize the imperfections due to undesired frequencies introduced by the modulation process. We find special values of the Rabi frequency that improve the fringes visibility.