Quivers as Calculators

Quivers are directed graphs which encode information
about the gauge groups and matter content of a large class of gauge theories,
many of which  have AdS/CFT duals. The counting of local  gauge
invariant operators  and  the  computation of their correlators
(in the free field limit)  can be done with the help of  simple
diagrammatic operations on  the quiver and
some  permutation group theory data. This data includes Young
diagrams,  Littlewood-Richardson numbers and branching coefficients of
permutation groups. Riemann surfaces obtained by thickening the quivers are intimately related to these

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Vendredi, Mai 17, 2013 - 11:00 to 12:30
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