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arXiv 1208.3263hep-th
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超对称双阱矩阵模型中的新临界行为

New critical behavior in a supersymmetric double-well matrix model

Tsunehide Kuroki, Fumihiko Sugino

摘要:

在一个简单的双势阱超对称矩阵模型中,计算了平面水平上的各种关联函数。该模型具有无限退化的真空,用填充分数ν_ \pm表示双势阱的两个极小点附近的矩阵特征值的个数.的计算是做一般填充分数对应的一般两个切割的解决方案的特征值分布。该模型在n=-2的随机曲面上映射为O(n)模型,模型的某些部分用c=-2物质的二维量子引力或(2,1)最小弦论描述.对于其他部门,在这种描述是不可能的,我们发现新的临界行为的幂对数的关联函数。把矩阵模型看作Penner模型的超对称模拟,从对称性和谱的角度讨论了矩阵模型与二维IIA超弦理论的对应关系.特别地,矩阵模型中的单迹算子自然地被解释为IIA型理论中的顶点算子。此外,关联函数的结果意味着相应的IIA型理论具有非平凡的Ramond-Ramond背景。

英文摘要:

We compute various correlation functions at the planar level in a simple supersymmetric matrix model, whose scalar potential is in shape of a double-well. The model has infinitely degenerate vacua parametrized by filling fractions ν_\pm representing the numbers of matrix eigenvalues around the two minima of the double-well. The computation is done for general filling fractions corresponding to general two-cut solutions for the eigenvalue distribution. The model is mapped to the O(n) model on a random surface with n=-2, and some sector of the model is described by two-dimensional quantum gravity with c=-2 matter or (2,1) minimal string theory. For the other sector in which such description is not possible, we find new critical behavior of powers of logarithm for correlation functions. We regard the matrix model as a supersymmetric analog of the Penner model, and discuss correspondence of the matrix model to two-dimensional type IIA superstring theory from the viewpoint of symmetry and spectrum. In particular, single-trace operators in the matrix model are naturally interpreted as vertex operators in the type IIA theory. Also, the result of the correlation functions implies that the corresponding type IIA theory has a nontrivial Ramond-Ramond background.

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