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Condensed Matter Seminars
Condensed Matter
Thursday, March 23, 2017
11:00 AM
Physics Building, Room 313

Abhishek Roy
[Host: Jeffrey Teo]
Institute for Theoretical Physics, University of Cologne
"The Haldane phase in spin chains with SU(N) symmetry"

ABSTRACT:
Spin chains with PSU(n) symmetry are known to have symmetry protected topological phases distinguished by boundary states. We determine the parent Hamiltonians of some of these phases at the AKLT point. In the adjoint representation we use a graphical method that produces expressions for arbitrary N. Finally we discuss the fate of the Haldane conjecture.




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