Affiliation:
1. University of Edinburgh
2. University of Washington
3. Korea Advanced Institute of Science and Technology
Abstract
We initiate the study of boundary Vertex Operator Algebras (VOAs) of topologically twisted 3d \mathcal{N}=4𝒩=4 rank-0 SCFTs. This is a recently introduced class of \mathcal{N}=4𝒩=4 SCFTs that by definition have zero-dimensional Higgs and Coulomb branches. We briefly explain why it is reasonable to obtain rational VOAs at the boundary of their topological twists. When a rank-0 SCFT is realized as the IR fixed point of a \mathcal{N}=2𝒩=2 Lagrangian theory, we propose a technique for the explicit construction of its topological twists and boundary VOAs based on deformations of the holomorphic-topological twist of the \mathcal{N}=2𝒩=2 microscopic description. We apply this technique to the BB twist of a newly discovered family of 3d \mathcal{N}=4𝒩=4 rank-0 SCFTs {\mathcal T}_r𝒯r and argue that they admit the simple affine VOAs L_r(\mathfrak{osp}(1|2))Lr(𝔬𝔰𝔭(1|2)) at their boundary. In the simplest case, this leads to a novel level-rank duality between L_1(\mathfrak{osp}(1|2))L1(𝔬𝔰𝔭(1|2)) and the minimal model M(2,5)M(2,5). As an aside, we present a TQFT obtained by twisting a 3d \mathcal{N}=2𝒩=2 QFT that admits the M(3,4)M(3,4) minimal model as a boundary VOA and briefly comment on the classical freeness of VOAs at the boundary of 3d TQFTs.
Funder
Engineering and Physical Sciences Research Council
International Centre for Theoretical Sciences
Ministry of Education
National Research Foundation of Korea