A system of BetheAnsatz type equations, which specify a unique array of Young diagrams responsible for the leading contribution to the Nekrasov partition function in the $\epsilon_2\rightarrow 0$ limit is derived. All the expectation values of the chiral fields $\langle \text{Tr} \phi^J \rangle $ are simple symmetric functions of the column lengths. An entire function $Q(z)$ whose zeros are determined by the column lengths is introduced. It satisfies a functional equation, resembling Baxter's TQ equation in 2d integrable models. This functional relation directly leads to a nice generalization of the equation defining SeibergWitten curve. A sort of Fourier transform maps the difference equation for $Q(z)$ into a differential equation which can be identified with the equation satisfied by 2d CFT conformal blocks including a degenerate field. Using AGT relation, in the case of the gauge group $U(2)^r$ and generic $\Omega$ background we find a differencedifferential equation for Q(z) generalizing Baxter's TQ relation.
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The duality between 4d SYM in Nekrasov Shatashvili limit and the semiclassical 2d CFT
Research Group:
Speaker:
Rubik Poghossyan
Schedule:
Thursday, February 9, 2017  14:30
Location:
A136
Abstract:
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