Tue October 3, 2023 4:00 pm
CUA Seminar – Joseph Thywissen: Orbital interactions between strongly confined fermions
Location:MIT 2-190
Joseph Thywissen,
University of Toronto
Ten Minute Talk:"Outreach Opportunities in the Mentoring Program at Cristo Rey" by Ryan Fay, Cristo Rey Boston High School
Do p-wave systems have universal properties? Ultracold gasses are normally dominated by s-wave interactions due to the centrifugal suppression of scattering channels with orbital angular momenta. A departure from the s-wave-dominated regime can be induced by femionic exchange symmetry, Feshbach resonances, and population of excited lattice bands. In this talk, I will discuss recent work that 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 dipolar systems, and also generalize to, for example, bosonic systems with d-wave interactions.