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arXiv 1010.5328hep-thmath-phmath.MP
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体和边界对数极小模型中的陪集图

Coset Graphs in Bulk and Boundary Logarithmic Minimal Models

Paul A. Pearce, Jorgen Rasmussen

摘要:

对数极小模型不是有理数的,但是在W-扩展图中,它们类似于有理数的共形场论。我们认为,W-投射表示是基本的积木在边界和散装描述这些理论。在边界理论中,每个由基本融合产生的W-投射表示都与一个边界条件相关联。在相应的Grothendieck环上的乘法得到了一个关于A-型扭仿射图A^{(2)}_{p}及其陪集图A^{(2)}_{p,p '}=A^{(2)}_{p} x A^{(2)}_{p'}/Z_2的Verlinder类公式.这为具有W-投影边界条件的共形配分函数提供了简洁的公式。在环面上,我们提出了模不变的配分函数作为半双线性形式的W-投影和有理极小字符,并观察到它们是由相同的陪集融合图编码。

英文摘要:

The logarithmic minimal models are not rational but, in the W-extended picture, they resemble rational conformal field theories. We argue that the W-projective representations are fundamental building blocks in both the boundary and bulk description of these theories. In the boundary theory, each W-projective representation arising from fundamental fusion is associated with a boundary condition. Multiplication in the associated Grothendieck ring leads to a Verlinde-like formula involving A-type twisted affine graphs A^{(2)}_{p} and their coset graphs A^{(2)}_{p,p'}=A^{(2)}_{p} x A^{(2)}_{p'}/Z_2. This provides compact formulas for the conformal partition functions with W-projective boundary conditions. On the torus, we propose modular invariant partition functions as sesquilinear forms in W-projective and rational minimal characters and observe that they are encoded by the same coset fusion graphs.

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