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- Fractional quantum numbers in Z2 spin liquids

Symmetry classifications of various types of exotic

quantum matter have recently become a topic of some interest, largely due to

the discovery of topological insulators.

In the context of spin liquids the question is not a new one --- Wen's

projective symmetry group is a well known approach --- but given recent

experimental and numerical interest it seems worth revisiting. I will describe work done with M. Hermele

that gives a symmetry classification of states with Z2 topological order, or in

other words, gapped Z2 spin liquids.

As the title suggests, we focus on the ways that

fractional excitations can transform under symmetry.

Event Type:

Seminar

Collection/Series:

Scientific Area(s):

Speaker(s):

Event Date:

Tuesday, February 19, 2013 - 15:30 to 17:00

Location:

Bob Room

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