Thurs. seminar

[CM ICTP - Trieste]

CONDENSED MATTER SECTION

	
SEMINAR on    Disorder and strong electron correlations



Thursday, 3 April   -    11:00 a.m.



Seminar Room,  Leonardo Bldg.- first floor



N. SURENDRAN  (I.C.T.P.)


"Topological phase transition in an exactly solvable model"


Abstract

	The Kitaev model is an exactly solvable spin-1/2 system on the 
honeycomb lattice.  It undergoes a topological phase transition from a 
phase with an energy gap carrying Abelian anyons to a gapless one with 
non-Abelian anyons. The model is generally considered a prototype to do 
quantum computation.  We construct and exactly solve a three 
dimensional model which is a generalization of the Kitaev model.  We 
further show that there are excitations localized on loops that can 
possibly obey nontrivial statistics.