Quantum Hall Effect: ``Two-dimensional Electron Systems: Duality in the Laboratory?''

por Dr. Cliff Burgess (Institute for Advanced Study, Princeton)

viernes 6 oct. 2000 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

Many features of Quantum Hall systems seem to be well described by the assumption that the important charge carriers are weakly interacting particles and vortices, which enjoy a large duality symmetry group (a level two subgroup of SL(2,Z)) which is based on particle-vortex interchange. This talk is meant as an introductiona to Quantum Hall systems with an emphasis on the evidence for the existence of this duality symmetry. A generalization of the symmetry to other two-dimensional systems is then proposed.