English

Constructing new open-closed TQFTs from the interpolation of symmetric monoidal categories

Quantum Algebra 2023-12-18 v1 Representation Theory

Abstract

For any symmetric monoidal category D\mathcal{D}, Lauda and Pfeiffer showed the equivalence between the D\mathcal{D}-valued open-closed 2-dimensional TQFTs and the so-called knowledgeable Frobenius algebras (KFAs) in D\mathcal{D}. Each KFA in D=VecK\mathcal{D}=\mathbf{Vec}_{\mathbb{K}} provides a sequence of scalars indexed by the set N2\mathbb{N}^2 of diffeomorphism classes of connected endocobordisms of the empty set, given by evaluation by the associated TQFT on each such cobordism class. From an arbitrary sequence χ=(χg,w)g,wN\chi=(\chi_{g,w})_{g,w\in\mathbb{N}}, we build a symmetric monoidal category Cχ\mathcal{C}_{\chi} -- with unit object 1\textbf{1} satisfying EndCχ(1)K\text{End}_{\mathcal{C}_{\chi}}(\textbf{1})\cong \mathbb{K} -- generated by a KFA object affording this sequence. We then determine which sequences χ\chi produce semisimple abelian categories Cχ\mathcal{C}_{\chi} with finite-dimensional hom-spaces. These form a family of categories interpolating the categories of representations of automorphism groups of certain KFAs in VecK\mathbf{Vec}_{\mathbb{K}}.

Keywords

Cite

@article{arxiv.2312.09809,
  title  = {Constructing new open-closed TQFTs from the interpolation of symmetric monoidal categories},
  author = {Barthélémy Neyra},
  journal= {arXiv preprint arXiv:2312.09809},
  year   = {2023}
}

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38 pages