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arXiv 0709.0432hep-th
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瞬子计数与矩阵模型

Instanton Counting and Matrix Model

Ta-Sheng Tai

摘要:

我们构造了Imbimbo-Mukhi型矩阵模型,它精确地再现了小相空间中${\mathbb{CP}^1}$拓扑弦的配分函数、${\cal{N}}=2$规范理论中Nekrasov的瞬子计数和球面上二维Yang-Mills理论中配分函数的大$N$极限.此外,我们提出了一个对偶Stieltjes-Wigert型矩阵模型,它出现在某些简单的复曲面Calabi-Yau流形上的所有亏格拓扑弦振幅与Imbimbo-Mukhi型模型进行比较。

英文摘要:

We construct an Imbimbo-Mukhi type matrix model, which reproduces exactly the partition function of ${\mathbb{CP}^1}$ topological strings in the small phase space, Nekrasov's instanton counting in ${\cal{N}}=2$ gauge theory and the large $N$ limit of the partition function in 2-dimensional Yang-Mills theory on a sphere. In addition, we propose a dual Stieltjes-Wigert type matrix model, which emerges when all-genus topological string amplitudes on certain simple toric Calabi-Yau manifolds are compared with the Imbimbo-Mukhi type model.

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