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Hubbard physics with ultracold polar molecules: on-site interaction energies for shielded molecules [dataset] Open Access

We explore on-site interaction energies U for pairs of shielded ultracold molecules on the same lattice site. We use 2-dimensional effective potentials appropriate for microwave shielding, which have dipole-dipole character at long range but feature a very large repulsive core when the two molecules come close together. This causes very strong correlation between the motions of two molecules on the same site. We nd behavior very different from that for ultracold atoms: in particular, there are states for which U is negative for weak lattices but crosses zero to positive values as the lattice strength increases. This behavior is found for both unbound pairs and 2-body bound states. The latter will give access to previously unexplored types of strongly dipolar Hubbard physics with multiple site occupancy.

Descriptions

Resource type

Dataset

Contributors

Stewart-Wiese, Carlin ¹
Creator: Dutta, Joy ¹
Hutson, Jeremy M. ¹

¹ Durham University

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Includes Python scripts, example-input files, example-output files, and figure data files.

Keyword

Ultracold molecules
Hubbard physics
Microwave shielding
Bound state energy
Molecular scattering

Subject

Ultracold molecules
Hubbard model
Shielding (Radiation)
Bound state energy
Quantum scattering

Location

Language

Cited in

Identifier

ark:/32150/r1f1881m027
doi:10.15128/r1f1881m027

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

J. Dutta

Date Uploaded

1 August 2026, 18:08:45

Date Modified

3 August 2026, 09:08:12

Audit Status

Audits have not yet been run on this file.

Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 52551

Last modified: 2026:08:01 19:31:52+01:00

Filename: Data_Repository.zip

Original checksum: a4499d85d0f037f084fb6c5b67efe0f5