Research lectures, seminars and events
The events listed in this area are research seminars, workshops and lectures hosted by Durham University departments and research institutes. If you are not a member of the University, but wish to enquire about attending one of the events please contact the organiser or host department.
|January 2012||March 2012|
Events for 10 February 2012
Four-dimensional CFTs dual to branes transverse to toric Calabi-Yau threefolds are described by bipartite graphs on a torus (dimer models). The theory of dessins d'enfants (children's drawings) describe these theories in terms of triples of permutations that multiply to one. Dessin d'enfants may be encoded as an elliptic curve equipped with a map to a sphere with three marked points. Symmetries of the superpotential acquire a geometric interpretation in this language. The complex structure of the elliptic curve relates to the R-charges of fields in the CFT in certain examples. I propose a D-brane interpretation of the complex structure parameter.