High Energy Physics Seminars

ics High Energy
Wednesday, February 23, 2011
3:30 PM
Physics Building, Room 204
Rob Leigh [Host: Diana Vaman ]
University of Illinois
"Topological Insulators, Gravity and Torsion"
 
 Slideshow (PDF)
ABSTRACT:
The effective action encoding elastic transport properties of topological insulators involves effective (non-dynamical) 'gravitational' variables. In the case of 2+1-dimensional time-reversal breaking topological insulators, the leading term in the action is a 'Chern-Simons' action involving the torsion of the connection. The coefficient of this term is the dissipationless Hall viscosity, a direct analogue of the Hall conductivity. In this talk, we review the calculation of the Hall viscosity in a simple model, and discuss its interesting renormalization properties.
SLIDESHOW:

To add a speaker, send an email to phys-speakers@Virginia.EDU. Please include the seminar type (e.g. High Energy Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available).