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arXiv 0902.2223hep-th
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随机矩阵理论中的普适冲击

Universal shocks in random matrix theory

Jean-Paul Blaizot, Maciej A. Nowak

摘要:

我们链接的随机矩阵合奏的冲击形成的现象,在一些流体动力学方程中的通用内核的外观。这样的方程是从戴森的随机行走后,适当的重新缩放的时间。在高斯酉包络的情况下,我们在这封信中集中,我们表明,正交多项式,和他们的柯西变换,根据一个粘Burgers方程与有效的“光谱粘度”$ν_s=1/2N$,其中$N$是矩阵的大小。我们与边缘的频谱的特征值的冲击,自然出现在伯格斯方程适当的初始条件,从而获得一个新的视角的普遍性。

英文摘要:

We link the appearance of universal kernels in random matrix ensembles to the phenomenon of shock formation in some fluid dynamical equations. Such equations are derived from Dyson's random walks after a proper rescaling of the time. In the case of the Gaussian Unitary Ensemble, on which we focus in this letter, we show that the orthogonal polynomials, and their Cauchy transforms, evolve according to a viscid Burgers equation with an effective "spectral viscosity" $ν_s=1/2N$, where $N$ is the size of the matrices. We relate the edge of the spectrum of eigenvalues to the shock that naturally appears in the Burgers equation for appropriate initial conditions, thereby obtaining a new perspective on universality.

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