Séminaire du LPTMS: Thomas Quella

Topological aspects of SU(N) magnetism and its cold atom realization

Thomas Quella, Universität Köln

SU(N) spin systems exhibit a number of novel topological quantum states, including specifically a variety of Haldane phases (in 1D) and abelian and non-abelian spin liquid phases (in 2D). In this talk we will review the classification of Haldane phases and their characterization in terms of fractionalized boundary spins and non-local string order parameters. Moreover, we will address the possible realization of these phases in ultra-cold gases of alkaline-earth fermions. If time permits we will also briefly comment on the systematic design of critical and topological long-range SU(N) spin models in one and two dimensions which are based on infinite dimensional matrix product states associated with SU(N) WZW models.

Date/Time : 19/05/2015 - 11:00 - 12:00

Location : LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay

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