Group seminar at LMU and Zoom: Progress towards a new 39K BEC apparatus: Controlling Interactions

Sukhman Singh, University of Toronto
Group seminar at LMU seminar room & Zoom
Friday, July 7th, 10:00am (MEZ)

Abstract:

I will present plans for a new experimental apparatus at the University of Toronto that aims to study Bose-Einstein  condensates with tuneable interactions. The bosonic isotope of potassium, 39K, has several broad magnetic Feshbach resonances that are well characterized by prior work. Utilizing these Feshbach resonances will allow for tuning the interactions between atoms in studies of quantum dynamics. We plan to turn interactions off in studies of transmission and reflection times of a tunnelling BEC, and conduct atomic Fabry-Pérot experiments. Conversely, in an optical lattice, tuneable interactions will allow variable on-site interaction strength independent of site-to-site tunnelling rates. We plan an all-optical cooling sequence that begins with loading atoms in a 3D MOT from a 2D MOT, followed by gray molasses cooling and evaporation within a crossed optical dipole trap.