Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Interactions and ultracold scattering of Cr with Yb

Jul 21, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Atomic, molecular, and charged-particle collisions Poster session


We investigate the scattering of a high-spin spherical atom Cr ($^7$S) with a closed shell atom Yb ($^1$S). We evaluate the spin-spin interaction arising from the multiple unpaired electrons from the Cr atom perturbed by the Yb atom, and show this provides a substantial coupling. We perform calculations of the magnetic Feshbach resonances this causes, and show are guaranteed to exist at low magnetic fields (below $\sim250$ G) with experimentally useful widths, regardless of the scattering length. This system has advantages over other similar systems such as alkali-metal+alkaline-earth systems – where the resonances are extremely narrow – and systems involving non-s-state atoms such as Er or Dy – which are extremely hard to make accurate microscopic models of. Applications of this system could include a starting point to form novel high-spin molecules or controlling interactions in a mixed gas of dipolar and non-dipolar atoms.

Presenter name Matthew Frye
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Primary authors

Dr Matthew Frye (University of Warsaw, Poland) Dr Piotr Żuchowski (Nicolaus Copernicus University in Toruń, Poland) Dr Michał Tomza (University of Warsaw, Poland)

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