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arXiv 1503.07584hep-thcond-mat.stat-mechmath-phmath.MP
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对数极小模型的边界代数和Kac模

Boundary algebras and Kac modules for logarithmic minimal models

Alexi Morin-Duchesne, Jorgen Rasmussen, David Ridout

摘要:

Virasoro Kac模最初被间接地引入作为表示,其特征出现在对数极小模型中某些传递矩阵的连续标度极限中,使用Temperley-Lieb代数描述。晶格转移算子包括使用Wenzl-Jones投影仪的边界上的接缝。如果投影是奇异的,原来的处方是选择一个子空间的Temperley-Lieb模块上的转移算子的行动是非奇异的。然而,一般来说,这个处方并不能产生坦珀利-李伯代数的表示,Virasoro Kac模在很大程度上仍然没有被识别。在这里,我们引入适当的代数框架的晶格分析作为一个商的单边界Temperley-Lieb代数。相应的标准模块的介绍和检查使用不变的双线性形式和它们的革兰氏行列式。Virasoro Kac模的结构是由这些结果推断出来的,并且发现它们是由Feigin-Fuchs模的R-G生成子模给出的.通过比较格融合的形式主义与Virasoro Kac模块的融合规则,获得了这种识别的额外证据。这些都得到了,在字符水平上,在完整的一般性,通过应用Verlinder式公式,并在模块水平上,在许多明确的例子中,通过应用Nahm-Gaberdiel-Kausch融合算法。

英文摘要:

Virasoro Kac modules were initially introduced indirectly as representations whose characters arise in the continuum scaling limits of certain transfer matrices in logarithmic minimal models, described using Temperley-Lieb algebras. The lattice transfer operators include seams on the boundary that use Wenzl-Jones projectors. If the projectors are singular, the original prescription is to select a subspace of the Temperley-Lieb modules on which the action of the transfer operators is non-singular. However, this prescription does not, in general, yield representations of the Temperley-Lieb algebras and the Virasoro Kac modules have remained largely unidentified. Here, we introduce the appropriate algebraic framework for the lattice analysis as a quotient of the one-boundary Temperley-Lieb algebra. The corresponding standard modules are introduced and examined using invariant bilinear forms and their Gram determinants. The structures of the Virasoro Kac modules are inferred from these results and are found to be given by finitely generated submodules of Feigin-Fuchs modules. Additional evidence for this identification is obtained by comparing the formalism of lattice fusion with the fusion rules of the Virasoro Kac modules. These are obtained, at the character level, in complete generality by applying a Verlinde-like formula and, at the module level, in many explicit examples by applying the Nahm-Gaberdiel-Kausch fusion algorithm.

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