Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing
We demonstrate microwave dressing on ultracold, fermionic 23Na40K ground-state molecules and observe resonant dipolar collisions with cross sections exceeding 3 times the s -wave unitarity limit. The origin of these interactions is the resonant alignment of the approaching molecules' dipoles al...
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Veröffentlicht in: | Physical review letters 2020-08, Vol.125 (6), p.1-063401, Article 063401 |
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creator | Yan, Zoe Z. Park, Jee Woo Ni, Yiqi Loh, Huanqian Will, Sebastian Karman, Tijs Zwierlein, Martin |
description | We demonstrate microwave dressing on ultracold, fermionic 23Na40K ground-state molecules and observe resonant dipolar collisions with cross sections exceeding 3 times the s -wave unitarity limit. The origin of these interactions is the resonant alignment of the approaching molecules' dipoles along the intermolecular axis, which leads to strong attraction. We explain our observations with a conceptually simple two-state picture based on the Condon approximation. Furthermore, we perform coupled-channel calculations that agree well with the experimentally observed collision rates. The resonant microwave-induced collisions found here enable controlled, strong interactions between molecules, of immediate use for experiments in optical lattices. |
doi_str_mv | 10.1103/PhysRevLett.125.063401 |
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subjects | Collision rates Dipoles Optical lattices |
title | Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing |
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