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Shielding collisions of ultracold CaF molecules with static electric fields [dataset] Open Access
We study collisions of ultracold CaF molecules in strong static electric fields. Such fields allow the creation of long-range barriers in the interaction potential, which prevent the molecules reaching the short-range region where inelastic and other loss processes are likely to occur. We carry out coupled-channel calculations of rate coefficients for elastic scattering and loss. We develop an efficient procedure for including energetically well-separated rotor functions in the basis set via a Van Vleck transformation. We show that shielding is particularly efficient for CaF and allows the rate of 2-body loss processes to be reduced by a factor of 10^7 or more at a field of 23 kV/cm. The loss rates remain low over a substantial range of fields. Electron and nuclear spins cause strong additional loss in some small ranges of field, but have little effect elsewhere. The results pave the way for evaporative cooling of CaF towards quantum degeneracy.
- Resource type
Creator: Frye, Matthew D. 1
Creator: Le Sueur, C. Ruth 1
Creator: Tarbutt, Michael R. 2
Creator: Hutson, Jeremy M. 1
1 Durham University, UK
2 Imperial College, UK
U.K. Engineering and Physical Sciences Research Council (EPSRC) Grant Nos. EP/P01058X/1
- Research methods
- Other description
Includes Fortran code and figure data files.
- Ultracold collisions between molecules
- Cited in
- Creative Commons Attribution 4.0 International (CC BY)
- Date Created
- B. Mukherjee
- Date Uploaded
- 27 June 2023, 19:06:13
- Date Modified
- 28 June 2023, 10:06:15
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File format: zip (ZIP Format)
Mime type: application/zip
File size: 597157
Last modified: 2023:06:27 20:27:21+01:00
Original checksum: c0e2517edfa9c3b130c2349fa4f76dc4
|User B. Mukherjee has updated Shielding collisions of ultracold CaF molecules with static electric fields [dataset]||6 months ago|