AMO Seminar: Joseph Thywissen, University of Toronto, “Orbital interactions between strongly confined fermions”

Event time: 
Friday, October 27, 2023 - 11:15am to 12:15pm
Sloane Physics Laboratory SPL, Room 51 See map
217 Prospect Street
New Haven, CT 06511
Joseph Thywissen, University of Toronto
Event description: 

Do p-wave systems have universal properties? Ultracold atoms are normally dominated by s-wave interactions, because scattering channels with orbital angular momenta must tunnel through a centrifugal barrier. However, femionic exchange symmetry and Feshbach resonances have been shown to enhance p-wave scattering. In this talk, I will discuss recent work that also uses strong confinement to control orbital interactions in spin-polarized Potassium 40. Spectroscopy of isolated atom pairs reveals multi-branched unitary interactions, enabling a test of the p-wave pseudopotential. In quasi-one-dimensional systems, we observe a surprising s-wave-like pair wave function. These developments may be relevant to fermionic molecular and mixture systems, and also generalize to, for example, bosonic systems with d-wave interactions.
Host: Nir Navon