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arXiv 0907.3946hep-th
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关于共形块的组合扩张

On Combinatorial Expansions of Conformal Blocks

A. Marshakov, A. Mironov, A. Morozov

摘要:

在最近的一篇论文(arXiv:0906.3219)中,提出了Nekrasov配分函数的非平凡二维共形场论表示。对于形变参数ε=ε_1+ε_2的非零值,瞬时配分函数用Liouville理论的共形块来确定,其中中心荷c = 1+ 6ε^2/ε_1ε_2.如果反过来,这个观察意味着共形块的通用部分,这是相同的所有二维共形理论与非退化Virasoro表示,拥有一个非平凡的分解为总和集的杨图,不同的自然分解研究共形场论。我们提供了一些关于这个有趣的新发展的最简单的情况下,四点关联函数的细节。

英文摘要:

In a recent paper (arXiv:0906.3219) the representation of Nekrasov partition function in terms of nontrivial two-dimensional conformal field theory has been suggested. For non-vanishing value of the deformation parameter ε=ε_1+ε_2 the instanton partition function is identified with a conformal block of Liouville theory with the central charge c = 1+ 6ε^2/ε_1ε_2. If reversed, this observation means that the universal part of conformal blocks, which is the same for all two-dimensional conformal theories with non-degenerate Virasoro representations, possesses a non-trivial decomposition into sum over sets of the Young diagrams, different from the natural decomposition studied in conformal field theory. We provide some details about this intriguing new development in the simplest case of the four-point correlation functions.

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