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UNIVERSITY OF CALIFORNIA, SANTA BARBARA BERKELEY DAVIS IRVINE LOS ANGELES MERCED RIVERSIDE SAN DIEGO SAN FRANCISCO
 

Summary: UNIVERSITY OF CALIFORNIA, SANTA BARBARA
BERKELEY DAVIS IRVINE LOS ANGELES MERCED RIVERSIDE SAN DIEGO SAN FRANCISCO
CSANTA BARBARA SANTA CRUZ
Geometry, Topology, and Physics Seminar
Self-duality, K-theory, and Orientifolds
Dan Freed
UT Austin
Friday, January 18, 2008, 4:00 p.m.
Room 6635 South Hall
Abstract: In joint work with Jacques Distler and Gregory Moore we develop the
theory of Ramond-Ramond fields on orientifolds in string theory. The mathematics
we encounter includes the localization theorem in (twisted) equivariant KO-theory,
KO-theoretic Wu classes, the self-duality of KO, etc. We derive the gravitational
contribution to Ramond-Ramond charge, generalizing a previous result in Type I
(the Green-Schwarz anomaly cancellation). Over the rationals this agrees with the
formula derived by Morales-Scrucca-Serone from the worldsheet point of view.
Information about future meetings of this seminar can be found at
http://www.math.ucsb.edu/~malmendier/GTPseminar/

  

Source: Akhmedov, Azer - Department of Mathematics, University of California at Santa Barbara

 

Collections: Mathematics