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Universality in the microwave shielding of ultracold polar molecules [dataset] Open Access

Microwave shielding is an important technique that can suppress the losses that arise from collisions of ultracold polar molecules. It has been instrumental in achieving molecular Bose-Einstein condensation (BEC) for NaCs [Bigagli et al., Nature 631, 289 (2024)]. We demonstrate that microwave shielding is universal, in the sense that the 2-body collision properties of different molecules are very similar when expressed in suitable reduced units of length and energy. This applies to rate coefficients for inelastic scattering and loss, to scattering lengths, and to the properties of 2-molecule bound states. We also explore the small deviations from universality that arise at very large Rabi frequencies. In general, the collision properties are near-universal except when the Rabi frequency exceeds a few percent of the molecular rotational constant. The universality extends to elliptically polarized microwaves and to combinations of multiple fields. Our results indicate that the methods that have been used to achieve BEC for NaCs can be transferred directly to most other polar molecules.

Descriptions

Resource type

Dataset

Contributors

Creator: Dutta, Joy ¹
Creator: Hutson, Jeremy M ¹
Contact person: Hutson, Jeremy M ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Includes Fortran codes, example-input files, example-output files, and figure data files.

Keyword

Ultracold collisions between dipolar molecules
Microwave field shielding
Controlling scattering lengths

Subject

Ultracold molecules
Shielding (Radiation)
Quantum scattering
Bose-Einstein gas
Bose-Einstein condensation

Location

Language

Cited in

Identifier

ark:/32150/r1zk51vg826
doi:10.15128/r1zk51vg826

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

J. Dutta

Date Uploaded

6 January 2025, 15:01:54

Date Modified

13 January 2025, 11:01:24

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File format: zip (ZIP Format)

Mime type: application/zip

File size: 4661598

Last modified: 2025:01:12 10:26:22+00:00

Filename: Data_for_repository.zip

Original checksum: e02fad3d81b3e9a223d49c13a464acce