Simultaneous Dual-Species Matter-Wave Accelerometer
A. Bonnin, N. Zahzam, Y. Bidel, and A. Bresson

TL;DR
This paper demonstrates a dual-species matter-wave interferometer using rubidium isotopes, achieving high-precision differential acceleration measurements and testing the Weak Equivalence Principle with promising results.
Contribution
It introduces a simultaneous dual-species atom interferometer with improved differential acceleration sensitivity and initial tests of the Weak Equivalence Principle.
Findings
Differential acceleration resolution below 3.9×10⁻⁸g
Effective common-mode vibration noise rejection
First differential free fall measurement between isotopes
Abstract
We report the realization of a matter-wave interferometer based on Raman transitions which simultaneously interrogates two different atomic species (Rb and Rb). The simultaneous aspect of our experiment presents encouraging preliminary results for future dual-species atom interferometry projects and seems very promising by taking advantage of a differential acceleration measurement. Indeed the resolution of our differential accelerometer remains lower than even with vibration levels up to thanks to common-mode vibration noise rejection . An atom based test of the Weak Equivalence Principle has also been carried out leading to a differential free fall measurement between both isotopes of .
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