One second interrogation time in a 200 round-trip waveguide atom interferometer

• URL: http://arxiv.org/abs/2201.11888v3
• Date: Sun, 3 Jul 2022 21:56:46 GMT
• Title: One second interrogation time in a 200 round-trip waveguide atom interferometer
• Authors: Hyosub Kim, Katarzyna Krzyzanowska, K. C. Henderson, C. Ryu, Eddy Timmermans, and Malcolm Boshier
• Abstract summary: We report a multiple-loop guided atom interferometer in which the atoms make 200 small-amplitude roundtrips, instead of one large single orbit. The scheme is resilient against noisy environments, achieving 0.9 s interrogation time without any vibration noise isolation or cancellation. The interferometer may also be a useful approach to building a compact multiple-loop Sagnac atom interferometer for rotation sensing.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report a multiple-loop guided atom interferometer in which the atoms make 200 small-amplitude roundtrips, instead of one large single orbit. The approach is enabled by using ultracold 39K gas and a magnetic Feshbach resonance that can tune the s-wave scattering length across zero to significantly reduce the atom loss from cold collisions. This scheme is resilient against noisy environments, achieving 0.9 s interrogation time without any vibration noise isolation or cancellation. A form of quantum lock-in amplification can be used with the device to measure localized potentials with high sensitivity. We used this technique to measure the dynamic polarizability of the 39K ground state at 1064 nm. The interferometer may also be a useful approach to building a compact multiple-loop Sagnac atom interferometer for rotation sensing.

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