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Exotic Excitations in Superfluid $^3$He: Topological Surface Excitations
Speaker Prof Yoonseok Lee
University of Florida, USA
Date 15 May 2017 (Monday)
Time 11:00 – 12:00
Venue Room 4475 (Lifts 25-26), HKUST
Superfluid phase of helium three has been the paradigm for symmetry-breaking phase transition in condensed matter physics. Unlike conventional condensed matter system, liquid helium three possesses maximal symmetry and almost all of them are broken below 2 mK where it enters p-wave spin triplet superfluid. In this talk, I will guide a walking tour of the progresses and developments made in this field in the past decade with emphasis on the surface Andreev bound states, which are topological excitations emerging from bulk-boundary correspondence in a 3D topological superfluid. We will discuss the effects of the surface excitations on flow dissipation in the B-phase of superfluid 3He.