Building New Quantum Systems with Mixtures of Ultracold Atomic Gases

Dr. Subhadeep Gupta (hosted by Kater Murch), Department of Physics, University of Washington, Seattle
February 6, 2017 at 4:00 pm
241 Compton
Event Description 

Two decades after the realization of Bose-Einstein condensates (BECs) in dilute gases, ultracold atoms remain excellent systems for simulating and exploring quantum many-body phenomena. The precise manipulations traditional to atomic physics can be utilized to methodically complicate the environment and observe the behavior of such quantum fluid systems. Such methods have been used to study phenomena such as phase transitions, Fermion-pairing, vorticity, and antiferromagnetic ordering in optical lattices. By combining two different elements in the ultracold regime, new quantum systems may be explored. In this talk, I will present our work combining ultracold atoms of lithium and ytterbium to create ultracold heteronuclear molecules. The long-range (dipolar) interactions between such molecules may be harnessed for future applications in quantum information processing. I will also present our realization of a two-element mixture of Bose and Fermi superfluids, a system out of reach with liquid helium mixtures. We study interactions in our system by observing shifts in collective oscillation frequencies, and through the observation of angular momentum exchange between the superfluids.

Coffee:  3:45 pm, 241 Compton