Zagier duality between the (E8,T1) and (T1,E8) Nahm systems is realized as 3d N=4 rank-zero mirror symmetry of two U(1)^8 Chern-Simons matter theories, with the duality interface generating the level-one E8 character.
G/G gauged WZW-matter model, Bethe Ansatz for q-boson model and Commutative Frobenius algebra
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abstract
We investigate the correspondence between two dimensional topological gauge theories and quantum integrable systems discovered by Moore, Nekrasov, Shatashvili. This correspondence means that the hidden quantum integrable structure exists in the topological gauge theories. We showed the correspondence between the G/G gauged WZW model and the phase model in JHEP 11 (2012) 146 (arXiv:1209.3800). In this paper, we study a one-parameter deformation for this correspondence and show that the G/G gauged WZW model coupled to additional matters corresponds to the q-boson model. Furthermore, we investigate this correspondence from a viewpoint of the commutative Frobenius algebra, the axiom of the two dimensional topological quantum field theory.
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3d $\mathcal N=4$ rank-zero mirror symmetry, TQFT interfaces, and Zagier duality of Nahm sums
Zagier duality between the (E8,T1) and (T1,E8) Nahm systems is realized as 3d N=4 rank-zero mirror symmetry of two U(1)^8 Chern-Simons matter theories, with the duality interface generating the level-one E8 character.