3d Large Vector Models at the Boundary
arXiv:2012.07733 · doi:10.21468/SciPostPhys.11.3.050
Abstract
We consider a 4d scalar field coupled to large free or critical vector models, either bosonic or fermionic, on a 3d boundary. We compute the function of the classically marginal bulk/boundary interaction at the first non-trivial order in the large expansion and exactly in the coupling. Starting with the free (critical) vector model at weak coupling, we find a fixed point at infinite coupling in which the boundary theory is the critical (free) vector model and the bulk decouples. We show that a strong/weak duality relates one description of the renormalization group flow to another one in which the free and the critical vector models are exchanged. We then consider the theory with an additional Maxwell field in the bulk, which also gives decoupling limits with gauged vector models on the boundary.
arXiv comment49 pages, v3: minor changes
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