527 citations · 1.7k across the 39 of their papers we have counts for
39 papers
N=2 superconformal blocks and instanton partition functions
V. Belavin, Niclas Wyllard
We consider the problem of computing (irregular) conformal blocks in 2d CFTs whose chiral symmetry algebra is the N=2 superconformal algebra. Our construction uses two ingredients:…
Coset conformal blocks and N=2 gauge theories
Niclas Wyllard
It was recently suggested that the su(N)_k+su(N)_p/su(N)_{k+p} coset conformal field theories should be related to N=2 SU(N) gauge theories on R^4/Z_p. In this paper we study vario…
Instanton partition functions in N=2 SU(N) gauge theories with a general surface operator, and their W-algebra duals
Niclas Wyllard
We write down an explicit conjecture for the instanton partition functions in 4d N=2 SU(N) gauge theories in the presence of a certain type of surface operator. These surface opera…
W-algebras and surface operators in N=2 gauge theories
Niclas Wyllard
A general class of W-algebras can be constructed from the affine sl(N) algebra by (quantum) Drinfeld-Sokolov reduction and are classified by partitions of N. Surface operators in a…
Affine sl(N) conformal blocks from N=2 SU(N) gauge theories
Can Kozcaz, Sara Pasquetti, Filippo Passerini +1
Recently Alday and Tachikawa proposed a relation between conformal blocks in a two-dimensional theory with affine sl(2) symmetry and instanton partition functions in four-dimension…
A & B model approaches to surface operators and Toda theories
Can Kozcaz, Sara Pasquetti, Niclas Wyllard
It has recently been argued by Alday et al that the inclusion of surface operators in 4d N=2 SU(2) quiver gauge theories should correspond to insertions of certain degenerate opera…