A high-flux source system for matter-wave interferometry exploiting tunable interactions
Abstract
Atom interferometers allow determining inertial effects to high accuracy. Quantum-projection noise as well as systematic effects impose demands on large atomic flux as well as ultra-low expansion rates. Here we report on a high-flux source of ultra-cold atoms with free expansion rates near the Heisenberg limit directly upon release from the trap. Our results are achieved in a time-averaged optical dipole trap and enabled through dynamic tuning of the atomic scattering length across two orders of magnitude interaction strength via magnetic Feshbach resonances. We demonstrate BECs with more than particles after evaporative cooling for ms and their subsequent release with a minimal expansion energy of nK in one direction. Based on our results we estimate the performance of an atom interferometer and compare our source system to a high performance chip-trap, as readily available for ultra-precise measurements in micro-gravity environments.
Cite
@article{arxiv.2307.06766,
title = {A high-flux source system for matter-wave interferometry exploiting tunable interactions},
author = {Alexander Herbst and Timothé Estrampes and Henning Albers and Vera Vollenkemper and Knut Stolzenberg and Sebastian Bode and Eric Charron and Ernst M. Rasel and Naceur Gaaloul and Dennis Schlippert},
journal= {arXiv preprint arXiv:2307.06766},
year = {2025}
}