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arXiv 0803.0785hep-th
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对数极小模型LM(1,p)的可积边界条件和W-扩展融合

Integrable Boundary Conditions and W-Extended Fusion in the Logarithmic Minimal Models LM(1,p)

Paul A. Pearce, Jorgen Rasmussen, Philippe Ruelle

摘要:

我们把对数极小模型LM(1,p)看作具有扩展W对称性的“有理”对数共形场论.为了与从晶格开始的扩展图像进行联系,我们将4p-2边界条件确定为基本Yang-Baxter可积晶格模型的可积边界条件的特定限制。具体来说,我们确定2 p可积边界条件,以匹配2 p已知的不可约W-表示。这些2 p扩展表示自然地分解为不可约Virasoro表示(r,s)的无限和。通过融合产生了另外的2 p-2可约但不可分解的秩为2的W-表示,这些W-表示分解为不可分解的秩为2的Virasoro表示的无限和。扩展图像中的融合规则是从已知的LM(1,p)的Virasoro表示的融合规则推导出来的,并发现与以前的工作一致。封闭的融合代数上的有限数量的表示在扩展图片是显着的确认一致性的格方法。

英文摘要:

We consider the logarithmic minimal models LM(1,p) as `rational' logarithmic conformal field theories with extended W symmetry. To make contact with the extended picture starting from the lattice, we identify 4p-2 boundary conditions as specific limits of integrable boundary conditions of the underlying Yang-Baxter integrable lattice models. Specifically, we identify 2p integrable boundary conditions to match the 2p known irreducible W-representations. These 2p extended representations naturally decompose into infinite sums of the irreducible Virasoro representations (r,s). A further 2p-2 reducible yet indecomposable W-representations of rank 2 are generated by fusion and these decompose as infinite sums of indecomposable rank-2 Virasoro representations. The fusion rules in the extended picture are deduced from the known fusion rules for the Virasoro representations of LM(1,p) and are found to be in agreement with previous works. The closure of the fusion algebra on a finite number of representations in the extended picture is remarkable confirmation of the consistency of the lattice approach.

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