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arXiv 1202.1241hep-latmath-phmath.MP
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Wilson Dirac算子的个体特征值分布

Individual Eigenvalue Distributions for the Wilson Dirac Operator

G. Akemann, A. C. Ipsen

备注：
20 pages, 5 figures; v2: typos corrected, refs added and discussion of W6 and W7 extended
发表信息：
JHEP 4 (2012), 102
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摘要：

我们导出了埃尔米特Wilson Dirac算子D5的个别本征值的分布以及Wilson Dirac算子DW的实本征值的分布。我们提供的框架是有效的手征微扰理论的任何数量的味道Nf和非零的低能量常数W 6，W7，W8的candidate制度。它是作为一个微扰展开的k-点谱密度关联函数和积分，在某些情况下，减少到Fredholm Pfweenan。对于DW的实本征值，在固定的手征性nu下，对于小的晶格间距“a”，这种展开在至多nu项之后截断。第一和第二特征值的分布的显式的例子给出在微观域中作为截断扩展的Fredholm Pfidian淬火D5，其中所有的k点密度是明确已知的随机矩阵理论。对于实特征值淬火DW在小“a”，我们说明我们的方法由相应的Fredholm行列式的大小为nu的有限扩展。

英文摘要：

We derive the distributions of individual eigenvalues for the Hermitian Wilson Dirac Operator D5 as well as for real eigenvalues of the Wilson Dirac Operator DW. The framework we provide is valid in the epsilon regime of chiral perturbation theory for any number of flavours Nf and for non-zero low energy constants W6, W7, W8. It is given as a perturbative expansion in terms of the k-point spectral density correlation functions and integrals thereof, which in some cases reduces to a Fredholm Pfaffian. For the real eigenvalues of DW at fixed chirality nu this expansion truncates after at most nu terms for small lattice spacing "a". Explicit examples for the distribution of the first and second eigenvalue are given in the microscopic domain as a truncated expansion of the Fredholm Pfaffian for quenched D5, where all k-point densities are explicitly known from random matrix theory. For the real eigenvalues of quenched DW at small "a" we illustrate our method by the finite expansion of the corresponding Fredholm determinant of size nu.

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