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Semiclassical theory of viscosity in quantum Hall states

Event Details

Event Dates: 

Friday, April 18, 2014 - 11:00am

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Rudro R. Biswas

Speaker Affiliation(s): 

University of Illinois at Urbana-Champaign
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

Quantum Hall states couple to the geometry of the real space surface they inhabit. As a result, the occupancy of a quantum Hall state is related to the genus of the real space compact manifold it populates. Recent developments, involving a careful reexamination of this coupling, have shown that these states possess a non-dissipative anomalous viscosity. In this talk I shall first give an overview of these phenomena and recapitulate how they follow from the well known Chern-Simons theory of a quantum Hall fluid. I shall then present a new semiclassical approach to understanding this viscous response, and other relevant properties of the quantum Hall states.