Tailoring multi-loop atom interferometers with adjustable momentum transfer
Abstract
Multi-loop matter-wave interferometers are essential in quantum sensing to measure the derivatives of physical quantities in time or space. Because multi-loop interferometers require multiple reflections, imperfections of the matter-wave mirrors create spurious paths that scramble the signal of interest. Here we demonstrate a method of adjustable momentum transfer that prevents the recombination of the spurious paths in a double-loop atom interferometer aimed at measuring rotation rates. We experimentally study the recombination condition of the spurious matter waves, which is quantitatively supported by a model accounting for the coherence properties of the atomic source. We finally demonstrate the effectiveness of the method in building a cold-atom gyroscope with a single-shot acceleration sensitivity suppressed by a factor of at least 50. Our study will impact the design of multi-loop atom interferometers that measure a single inertial quantity.
Cite
@article{arxiv.2006.08371,
title = {Tailoring multi-loop atom interferometers with adjustable momentum transfer},
author = {L. A. Sidorenkov and R. Gautier and M. Altorio and R. Geiger and A. Landragin},
journal= {arXiv preprint arXiv:2006.08371},
year = {2020}
}
Comments
4 pages of main text, 33 references, 6 pages of Supplemental Material