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arXiv math-ph/0210060math-phmath.MPnlin.CD
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量子星图的本征函数和谱行列式的值分布

Value distribution of the eigenfunctions and spectral determinants of quantum star graphs

J. P. Keating, J. Marklof, B. Winn

摘要:

计算了星图族上薛定谔算子的本征函数和谱行列式的值分布。的光谱行列式的值示出具有柯西分布相对于两个平均超过债券长度的限制,作为波数趋于无穷大和平均超过波数时,债券长度是固定的,而不是合理的相关。这与随机矩阵的谱行列式相反,已知随机矩阵的对数满足高斯极限分布。本征函数的值分布也不同于相应的随机矩阵结果。我们认为,谱行列式和本征函数的值分布应符合Seba型台球。

英文摘要:

We compute the value distributions of the eigenfunctions and spectral determinant of the Schrodinger operator on families of star graphs. The values of the spectral determinant are shown to have a Cauchy distribution with respect both to averages over bond lengths in the limit as the wavenumber tends to infinity and to averages over wavenumber when the bond lengths are fixed and not rationally related. This is in contrast to the spectral determinants of random matrices, for which the logarithm is known to satisfy a Gaussian limit distribution. The value distribution of the eigenfunctions also differs from the corresponding random matrix result. We argue that the value distributions of the spectral determinant and of the eigenfunctions should coincide with those of Seba-type billiards.

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