NUIM Math. Physics seminar

Maria Hermanns  
Stockholm University

Quasielectrons in fractional quantum Hall states

Monday 23 November 2009 at 4.00 p.m.

JH4 (John Hume Lecture Theatre 4), John Hume Building, NUIM North Campus

Abstract:

Quantum Hall liquids form when electrons, trapped on a 2D surface, are subjected to a strong magnetic field and cooled to very low temperatures. One of the most fascinating features of these strongly correlated quantum liquids are their anyonic excitations, which have fractional electric charge and are believed to obey fractional, or even non-Abelian, exchange statistics. Evidence for the latter has recently been seen in interferometer experiments. In this talk, I will review these excitations using conformal field theory techniques and show some new developments, such as the condensation of non-Abelian quasi-particles. This condensation gives rise to a new state, with
transformed non-Abelian statistics.

All are welcome. Tea/coffee and biscuits to follow. For directions to the Dept. please check http://www.thphys.nuim.ie/map.php