Supersymmetric intersecting surface defects in fourdimensional N=2 theories can be viewed as coupled 4d/2d/0d supersymmetric systems preserving two supercharges. Their partition functions are expected to match with Liouville/Toda correlators via a generalization of AGT correspondence. In this talk, we will start by reviewing some relevant back grounds. Then we move on to two simple systems of free hypermultiplets in the presence of intersecting defects. We present their partition functions, match them with Liouville fourpoint functions, and discuss a Seiberglike duality. We will also discuss a Higgsing procedure, which is a straightforward way to computing partition functions in the presence of (intersecting) surface defects. We will then summarize and propose a set of conjectures.
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Intersecting Surface Defects and TwoDimensional CFT
Research Group:
Yiwen Pan
Institution:
Uppsala University
Location:
A136
Schedule:
Thursday, December 1, 2016  16:00
Abstract:
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