Found 4 result(s)

19.11.2015 (Thursday)

5d theories on curved backgrounds, Yang-Mills deformations and instantons

Regular Seminar Diego Rodriguez-Gomez (Universidad de Oviedo)

at:
14:00 QMW
room G.O. Jones 610
abstract:

5d theories can be at fixed points, in many cases exhibiting rather amusing properties. In this talk we will study several properties of these fixed point theories. In particular, we will describe how to put them supersymmetrically in curved spaces. As a consequence, we will discuss when a deformation to a Yang-Mills theory is possible. The latter typically exhibit a smaller global symmetry that that of the fixed point theory, which, from the YM point of view, appears as an enhanced symmetry. In this enhancement instantons play a pivotal role, and we will discuss several aspects of these.

18.11.2015 (Wednesday)

Polygon Seminar: An introduction to the Hilbert series as operator counting

Triangular Seminar Diego Rodriguez-Gomez (University of Oviedo)

at:
15:00 QMW
room GO Jones 610
abstract:

Counting operators in supersymmetric field theories is very interesting, as the corresponding generating functions encode properties of the field theory. In this lecture we will mostly concentrate on 4d SUSY field theories. After reviewing some basic notions about SUSY field theories leading to the notion of chiral ring, we will introduce a generating function enumerating operators in the ring. This function is the so-called Hilbert series. In the case of SCFTs with a gravity dual, we will show how this function recovers geometric properties of the dual gravity background. The uses of the Hilbert series go beyond this, since, as we will see, being a counting of operators, it is of relevance in the computation of instanton partition functions for pure gauge theories. In the second part of the lecture we will briefly touch upon these issues.

27.02.2014 (Thursday)

Aspects of 5d gauge theories

Regular Seminar Diego Rodriguez-Gomez (Oviedo U.)

at:
14:00 QMW
room G.O. Jones 208
abstract:

In this talk I will review recent progress in understanding aspects of 5d gauge theories. Under certain circumstances these can be at fixed points admitting a large N limit, whose gravity dual we will discuss. Such gravity dual suggests a yet more general class of quiver-type fixed point theories which can sometimes be understood in terms of S-duality. To this matter the braneweb construction of the theories will prove very helpful, yielding new insights which we will test using the 5d superconformal index.

26.02.2014 (Wednesday)

Aspects of 5d gauge theories

Regular Seminar Diego Rodriguez-Gomez (Oviedo)

at:
14:30 IC
room H503
abstract:

In this talk I will review recent progress in understanding aspects of 5d gauge theories. Under certain circumstances these can be at fixed points admitting a large N limit, whose gravity dual we will discuss. Such gravity dual suggests a yet more general class of quiver-type fixed point theories which can sometimes be understood in terms of S-duality. To this matter the braneweb construction of the theories will prove very helpful, yielding new insights which we will test using the 5d superconformal index.