Cardy algebras and sewing constraints, II

Abstract

This is the part II of a two-part work started in arXiv:0807.3356 [math.QA]. In part I, Cardy algebras were studied, a notion which arises from the classification of genus-0,1 open-closed rational conformal field theories. In this part, we prove that a Cardy algebra also satisfies the higher genus factorisation and modular-invariance properties formulated in arXiv:hep-th/0612306 in terms of the notion of a solution to the sewing constraints. We present the proof by showing that the latter notion, which is defined as a monoidal natural transformation, can be expressed in terms of generators and relations, which correspond exactly to the defining data and axioms of a Cardy algebra.

79 pages, 244 figures, comments are welcome

References in corpus (5)

• D-branes and K-theory in 2D topological field theory
• Cardy algebras and sewing constraints, I
• Morita classes of algebras in modular tensor categories
• Closed/open string diagrammatics
• Finitely semisimple spherical categories and modular categories are self-dual

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