Week 09.12.2017 – 17.12.2017


Generalized Wilson loops in N=4 SYM and correlators on a line

Regular Seminar Arkady Tseytlin (Imperial College)

13:15 KCL
room K4.31

We will discuss generalized circular Wilson loops and 1d CFT defined by correlators of operators inserted along the loop following arXiv:1706.00756 and some more recent work.


Branes and the Kraft-Procesi transition

Regular Seminar Santiago Cabrera Marquez (Imperial College London)

14:00 QMW
room G O Jones 610

Type IIB superstring brane configurations can have a low energy dynamics described by an effective 3d N=4 gauge theory. The moduli space of the gauge theory is normally a Hyperkähler variety. Singular points in the variety correspond to brane configurations where some fields become massless, giving rise to the Higgs mechanism. I will explain the relevance of a set of theories whose moduli space is the closure of a nilpotent orbit of Lie(F), where F is the flavour symmetry group of the theory. I will show how the mathematical description of the "transverse slice" between two nilpotent orbits can be understood in terms of brane dynamics as a realisation of the Higgs mechanism.