Event Date and Time
Dr. Woowon Kang, University of Chicago
In two spatial dimensions quantum mechanical particles are not limited to being bosons or fermions but can become particles known as anyons. There is a strong theoretical support for the elementary excitations of the fractional quantum Hall effect (FQHE) being anyons. Anyons are said to come in two major flavors: Abelian and non-Abelian. The enigmatic evendenominator FQHE state at filling of n = 5/2 is perhaps the most likely candidate for non- Abelian statistics. However, detection of the postulated non-Abelian anyons in the FQHE is a long sought after goal that is known to be quite difficult. In this talk I will present our recent findings on quantum interference experiments in the FQHE regime in which the statistical angle of anyonic braiding processes can be measured. At n = 5/2 filling we observe unambiguous anyonic phase jumps of p/4 and p, which respectively are the statistical angles for the e/4 quasiparticles excitations and the Majorana zero mode of the 5/2 FQHE state. Our interferometry results provide a strong support for a non-Abelian ground state at the 5/2 filling.