Subhadeep Gupta, University of Washington, Resonant Interactions in Ultracold Fermions: Superfluid Mixtures and Novel Molecules

Speaker

Subhadeep Gupta
Department of Physics
University of Washington

Bio

Subhadeep Gupta is a Professor of Physics at the University of Washington, Seattle. He obtained his PhD in 2003 from Massachusetts Institute of Technology in the area of experimental atomic physics, where he worked on Bose-Einstein condensates and performed early experiments with quantum degenerate Fermi gases. He was then a Miller post-doctoral fellow at UC Berkeley where he worked on Bose-Einstein condensates in ring geometries and in optical cavities. He joined the physics department at the University of Washington in 2007. His research interests include ultracold quantum gases and atomic superfluids, ultracold molecules, and atomic interferometry.

Abstract

Trapped ensembles of neutral atoms at nanoKelvin temperatures form pristine material with which to model complex quantum systems and build new ones for fundamental physics and applications. For example, fermion pairing can be explored using an ultracold gas magnetically tuned to a collisional Feshbach resonance. By combining atomic gases of two different elements, we realize a mixture of Bose and Fermi superfluids, a system out of reach with liquid helium mixtures. In another set of studies, we observe and elucidate an exotic collisional resonance between fermions with closed and open electronic shell-structure. This opens up the opportunity to efficiently create ultracold di-atomic molecules with an unpaired electron, promising candidates for ultracold chemistry, quantum simulation, and information processing.