Condensed Matter Seminar - "Hall viscosity beyond two dimensions"
- Event Type
- Seminar/Symposium
- Sponsor
- Physics - Condensed Matter
- Date
- Mar 11, 2022 1:00 pm
- Speaker
- Barry Bradlyn, University of Illinois at Urbana-Champaign
- Contact
- Stephen Bullwinkel
- bullwinkelstephen@hotmail.com
- Phone
- 217-333-1652
- Views
- 89
- Originating Calendar
- Physics - Condensed Matter Seminar
One of the many new ideas that grew out of the discovery of the quantum Hall effect is the notion of Hall viscosity. The Hall viscosity determines the non-dissipative stresses that develop in a fluid when it flows with a nonuniform velocity. In isotropic, two-dimensional fluids there is a unique Hall viscosity, which can in some cases be related to a topological invariant. In this talk, I will explore what happens when the assumptions of two-dimensionality and isotropy are relaxed. First, I'll show how new non-dissipative viscosity coefficients emerge with only discrete rotational symmetry, and I will connect these with the phenomenology of two-dimensional electron systems. Next, I'll show how cubic symmetry in three dimensions allows for intrinsically three-dimensional Hall viscosity coefficients. Finally, I will show how anisotropic viscosity coefficients can be measured using free surface waves in classical and quantum fluids.