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arXiv 0709.2992hep-th
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从矩阵模型的拓扑展开到拓扑弦论:用代数几何计数曲面

From matrix models' topological expansion to topological string theories: counting surfaces with algebraic geometry

N. Orantin

摘要:

引入2-矩阵模型研究随机曲面上的伊辛模型。从那时起,矩阵模型和离散表面的组合学之间的联系就非常紧密。这份手稿的目的是研究这些深层的联系,并将它们扩展到矩阵模型之外,跟随我的工作的发展。首先,我照顾到适当定义的厄米2矩阵模型,它产生的生成函数的离散表面配备了自旋结构。然后,我展示了如何使用代数几何工具来计算任何可观测量的拓扑展开中的所有项。它们作为与模型相关的代数曲线上的微分形式获得:谱曲线。在第二部分中,我将展示如何定义任何代数曲线上的微分,即使它不是来自矩阵模型。然后,我研究他们的许多对称性下变形的代数曲线。特别是,我表明,这些对象符合的拓扑扩展的观测量的矩阵模型,如果代数曲线是该模型的谱曲线。最后,我表明,微调的参数,确保这些对象可以被提升到模块化的不变量,并满足Kodaira-Spencer理论的全纯异常方程。这给了Dijkgraaf-Vafa猜想正确的一个新提示。

英文摘要:

The 2-matrix model has been introduced to study Ising model on random surfaces. Since then, the link between matrix models and combinatorics of discrete surfaces has strongly tightened. This manuscript aims to investigate these deep links and extend them beyond the matrix models, following my work's evolution. First, I take care to define properly the hermitian 2 matrix model which gives rise to generating functions of discrete surfaces equipped with a spin structure. Then, I show how to compute all the terms in the topological expansion of any observable by using algebraic geometry tools. They are obtained as differential forms on an algebraic curve associated to the model: the spectral curve. In a second part, I show how to define such differentials on any algebraic curve even if it does not come from a matrix model. I then study their numerous symmetry properties under deformations of the algebraic curve. In particular, I show that these objects coincide with the topological expansion of the observable of a matrix model if the algebraic curve is the spectral curve of this model. Finally, I show that fine tuning the parameters ensure that these objects can be promoted to modular invariants and satisfy the holomorphic anomaly equation of the Kodaira-Spencer theory. This gives a new hint that the Dijkgraaf-Vafa conjecture is correct.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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