Free Field Realisation of the Chiral Universal Centraliser.
Free Field Realisation of the Chiral Universal Centraliser.
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DOI:
10.1007/s00023-023-01305-1
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发表时间:
2023
影响因子:
1.5
通讯作者:
Nair, Sujay
中科院分区:
文献类型:
--
作者:
Beem, Christopher;Nair, Sujay
In the TQFT formalism of Moore–Tachikawa for describing Higgs branches of theories of class , the space associated to the unpunctured sphere in type is the universal centraliser , where . In more physical terms, this space arises as the Coulomb branch of pure gauge theory in three dimensions with gauge group , the Langlands dual. In the analogous formalism for describing chiral algebras of class , the vertex algebra associated to the sphere has been dubbed the chiral universal centraliser. In this paper, we construct an open, symplectic embedding from a cover of the Kostant–Toda lattice of type to the universal centraliser of G—extending a classic result of Kostant. Using this embedding and some observations on the Poisson algebraic structure of , we propose a free field realisation of the chiral universal centraliser for any simple group G. We exploit this realisation to develop free field realisations of chiral algebras of class of type for theories of genus zero with punctures. These realisations make generalised S-duality completely manifest, and the generalisation to punctures is conceptually clear, though technically burdensome.
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