Tailoring multi-loop atom interferometers with adjustable momentum transfer

• URL: http://arxiv.org/abs/2006.08371v2
• Date: Mon, 23 Nov 2020 11:43:23 GMT
• Title: Tailoring multi-loop atom interferometers with adjustable momentum transfer
• Authors: L. A. Sidorenkov, R. Gautier, M. Altorio, R. Geiger, A. Landragin
• Abstract summary: Multi-loop matter-wave interferometers are essential in quantum sensing to measure the derivatives of physical quantities in time or space. 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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