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arXiv 0811.2825hep-th
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矩阵模型的配分函数作为弦论的第一特殊函数。II。孔采维奇模型

Partition Functions of Matrix Models as the First Special Functions of String Theory. II. Kontsevich Model

A. Alexandrov, A. Mironov, A. Morozov, P. Putrov

摘要:

在arXiv:hep-th/0310113中,我们开始编写一本关于矩阵模型τ函数的参考书,这是新一代的特殊函数,将在弦论计算中发挥重要作用。该论文的主要重点是一个矩阵埃尔米特模型τ函数。本文研究了Kontsevich和广义Kontsevich模型(GKM)τ-函数的一个直接对应。我们主要集中在计算预解式(=循环算子平均值)的Kontsevich模型,特别强调其最简单的(高斯)阶段,其中存在一个令人惊讶的积分公式,并在亏格0和1的预解式的表达式是特别简单的(特别是,我们推广已知的亏格0结果亏格1)。我们还讨论了Kontsevich模型的通用阶段的各种功能,特别是,对应的明确的高斯解决方案在通用的情况下,解决方案称为Dijkgraaf-Vafa(DV)解决方案。进一步地,我们将结果推广到GKM,特别地,在(2,3)和(3,2)模型之间对偶的例子中,讨论了p-q对偶的预解式和相应的Riemann曲面.

英文摘要:

In arXiv:hep-th/0310113 we started a program of creating a reference-book on matrix-model tau-functions, the new generation of special functions, which are going to play an important role in string theory calculations. The main focus of that paper was on the one-matrix Hermitian model tau-functions. The present paper is devoted to a direct counterpart for the Kontsevich and Generalized Kontsevich Model (GKM) tau-functions. We mostly focus on calculating resolvents (=loop operator averages) in the Kontsevich model, with a special emphasis on its simplest (Gaussian) phase, where exists a surprising integral formula, and the expressions for the resolvents in the genus zero and one are especially simple (in particular, we generalize the known genus zero result to genus one). We also discuss various features of generic phases of the Kontsevich model, in particular, a counterpart of the unambiguous Gaussian solution in the generic case, the solution called Dijkgraaf-Vafa (DV) solution. Further, we extend the results to the GKM and, in particular, discuss the p-q duality in terms of resolvents and corresponding Riemann surfaces in the example of dualities between (2,3) and (3,2) models.

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