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Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing
Name
PhysRevLett.125.063401.pdf
Description
Published version
Size
624.65 KB
Format
Adobe PDF
Checksum (MD5)
6b1f3d48e0ee51e37ddf52ccf5c7ecd1
Author(s)
Yan, Zoe Z
Park, Jee Woo
Ni, Yiqi
Loh, Huanqian
Will, Sebastian
Karman, Tijs
Zwierlein, Martin
Date Issued
2020
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2020 American Physical Society. We demonstrate microwave dressing on ultracold, fermionic Na23K40 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.
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DOI of Published Version
10.1103/PHYSREVLETT.125.063401
