Related papers: Matter-wave collimation to picokelvin energies with scattering length and potential shape control

Matter-wave collimation to picokelvin energies with scattering length and potential shape control

URL: http://arxiv.org/abs/2310.04383v3
Date: Thu, 25 Apr 2024 12:48:33 GMT
Title: Matter-wave collimation to picokelvin energies with scattering length and potential shape control
Authors: Alexander Herbst, Timothé Estrampes, Henning Albers, Robin Corgier, Knut Stolzenberg, Sebastian Bode, Eric Charron, Ernst M. Rasel, Naceur Gaaloul, Dennis Schlippert,
Abstract summary: We investigate the impact of atomic interactions on collimation by applying a lensing protocol to a $39$K Bose-Einstein condensate. Our results pave the way to realize ensembles with more than $1times105$ atoms and 3D energies in the two-digit pK range.
Score: 32.94471451530934
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: The sensitivity of atom interferometers depends on their ability to realize long pulse separation times and prevent loss of contrast by limiting the expansion of the atomic ensemble within the interferometer beam through matter-wave collimation. Here we investigate the impact of atomic interactions on collimation by applying a lensing protocol to a $^{39}$K Bose-Einstein condensate at different scattering lengths. Tailoring interactions, we measure energies corresponding to $340 \pm 12$ pK in one direction. Our results are supported by an accurate simulation, which allows us to extrapolate a 2D ballistic expansion energy of $438 \pm 77$ pK. Based on our findings we propose an advanced scenario, which enables 3D expansion energies below $16$ pK by implementing an additional pulsed delta-kick. Our results pave the way to realize ensembles with more than $1\times10^5$ atoms and 3D energies in the two-digit pK range in typical dipole trap setups without the need for micro-gravity or long baseline environments.

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