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Math/Physics Seminar Provisional title: "Twisted equivariant matter"

Event Type
Other
Topic
mathematics
Sponsor
Physics Department
Location
464 Loomis (1110 W Green St., Urbana)
Date
Nov 1, 2012   12:00 pm  
Speaker
Dan Freed, University of Texas, Austin, Dept. of Mathematics
Originating Calendar
Physics - Mathematical and Theoretical Physics Seminar

Wigner's basic theorem about symmetries of quantum mechanics (which may be interpreted as a theorem in Riemannian geometry) leads in many cases to discrete invariants of quantum systems. In joint work with Greg Moore we formulate in mathematical terms the notion of "topological phase" and apply it to the study of topological insulators in condensed matter physics. Topological phases are then measured by twisted equivariant K-theory.

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