281 citations · 961 across the 10 of their papers we have counts for
16 papers
On 2d TQFTs whose values are holomorphic symplectic varieties
Gregory W. Moore, Yuji Tachikawa
For simple and simply-connected complex algebraic group G, we conjecture the existence of a functor eta_G from the category of 2-bordisms to the category of holomorphic symplectic…
Instanton counting with a surface operator and the chain-saw quiver
Hiroaki Kanno, Yuji Tachikawa
We describe the moduli space of SU(N) instantons in the presence of a general surface operator of type N=n_1+ ... +n_M in terms of the representations of the so-called chain-saw qu…
On W-algebras and the symmetries of defects of 6d N=(2,0) theory
Yuji Tachikawa
We consider 6d N=(2,0) theory on N M5-branes, together with a 4d defect labeled by a Young diagram Y specifying its global symmetry G_Y. A recent conjecture states that a compactif…
Comments on scaling limits of 4d N=2 theories
Davide Gaiotto, Nathan Seiberg, Yuji Tachikawa
We revisit the study of the maximally singular point in the Coulomb branch of 4d N=2 SU(N) gauge theory with N_f=2n flavors for N_f<2N. When n >= 2, we find that the low-energy phy…
Webs of five-branes and N=2 superconformal field theories
Francesco Benini, Sergio Benvenuti, Yuji Tachikawa
We describe configurations of 5-branes and 7-branes which realize, when compactified on a circle, new isolated four-dimensional N=2 superconformal field theories recently construct…
Six-dimensional D_N theory and four-dimensional SO-USp quivers
Yuji Tachikawa
We realize four-dimensional N=2 superconformal quiver gauge theories with alternating SO and USp gauge groups as compactifications of the six-dimensional D_N theory with defects. T…