Differential phase extraction in dual interferometers exploiting the correlation between classical and quantum sensors

TL;DR

This paper experimentally demonstrates a method to extract the differential phase in dual atom interferometers by correlating their signals with a classical sensor, achieving vibration noise immunity and optimal sensitivity.

Contribution

The study implements a novel approach to differential phase extraction using correlation with classical sensors, enhancing noise robustness in dual atom interferometry.

Findings

Achieved vibration noise immunity in differential phase measurement.

Demonstrated optimal sensitivity limited by detection noise.

Validated the method with experimental dual atom interferometer setup.

Abstract

We perform the experimental demonstration of the method proposed in [Phys. Rev. A 91, 063615 (2015)] to extract the differential phase in dual atom interferometers. From a single magneto-optical trap, we generate two atomic sources, vertically separated and free-falling synchronously, with the help of an accelerated lattice. We drive simultaneous Raman interferometers onto the two sources, and use the correlation with the vibration signal measured by a seismometer to extract the phase of each interferometer. We demonstrate an optimal sensitivity of the extracted differential phase between the two interferometers, free from vibration noise and limited by detection noise, when the two interferometers are in phase.