The Triangle Nuclear Theory Colloquium (TNT) is a DOE-funded Colloquium series jointly organized and held at Duke University, the University of North Carolina at Chapel Hill (UNC) and the North Carolina State University (NC-State).

Speaker: Evan Berkowitz

Institution:  Forschungszentrum Jülich

Title

Finding Vortices in the BKT Transition of 2D Fermi Gases

Abstract

Fermi gases may be confined to two dimensions by optical traps in modern experiments or by astrophysical effects and are expected to undergo the Berezinskii-Kosterlitz-Thouless transition.  While a variety of experimental and computational approaches have determined the BKT temperature as a function of the interaction, none directly probe the vortices at the heart of the BKT story.

I will give an introduction to the BKT transition, Fermi gases in 2D, and our lattice-field-theoretical computational method.  I will explain our approach of constructing vortex-sensitive observables and using them to detect the BKT transition.

Based on work with Neill Warrington, to appear.

To let us know if you want to meet with Evan during his TNT visit, contact either me jomo101@email.unc.edu or Amy Nicholson annichol@email.unc.edu