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arXiv 0710.1397math-phhep-thmath.MPmath.QA
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从共形嵌入到量子对称性:一个例外的SU(4)例子

From conformal embeddings to quantum symmetries: an exceptional SU(4) example

Robert Coquereaux, Gil Schieber

摘要:

我们简要地讨论了几种用于描述环面上边界共形场论量子对称性的代数工具。起点是一个融合范畴,以及一个作用于另一个由量子图描述的范畴。对于已知的例子,相应的模块不变的配分函数,这是有时与保形嵌入,提供了足够的信息来恢复整个结构。我们用SU(4)在第4层共形嵌入到自旋(15)在第1层的例子来说明这些概念,从而得到例外的量子图E4(SU(4))。

英文摘要:

We briefly discuss several algebraic tools that are used to describe the quantum symmetries of Boundary Conformal Field Theories on a torus. The starting point is a fusion category, together with an action on another category described by a quantum graph. For known examples, the corresponding modular invariant partition function, which is sometimes associated with a conformal embedding, provides enough information to recover the whole structure. We illustrate these notions with the example of the conformal embedding of SU(4) at level 4 into Spin(15) at level 1, leading to the exceptional quantum graph E4(SU(4)).

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