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arXiv 1010.0276nlin.CDmath-phmath.MPmath.SP
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“细胞”台球的谱统计

Spectral Statistics of "Cellular" Billiards

Boris Gutkin

摘要:

对于一个平面有界域$Ω^0$,其边界包含若干个平面片$Γ_i$,我们考虑一族非对称台球$Ω$,它是通过沿$Γ_i$的若干个$Ω^0$的拷贝拼接而成的.证明了$Ω$周期轨道的长度谱是简并的,其重数由矩阵群$G$决定。我们研究了$Ω$中相应量子台球问题的能谱,并证明了它可以分裂成若干不相关的子谱,对应于$G$的一组不可约表示$α$.假设$Ω^0$中的经典动力学是混沌的,我们推导出每个谱分量的半经典迹公式,并证明它们的能级统计与标准随机矩阵系综中的相同。根据$α$是实数、伪实数还是复数,谱分别具有高斯正交、高斯辛或高斯酉类型的统计。

英文摘要:

For a bounded planar domain $Ω^0$ whose boundary contains a number of flat pieces $Γ_i$ we consider a family of non-symmetric billiards $Ω$ constructed by patching several copies of $Ω^0$ along $Γ_i$'s. It is demonstrated that the length spectrum of the periodic orbits in $Ω$ is degenerate with the multiplicities determined by a matrix group $G$. We study the energy spectrum of the corresponding quantum billiard problem in $Ω$ and show that it can be split in a number of uncorrelated subspectra corresponding to a set of irreducible representations $α$ of $G$. Assuming that the classical dynamics in $Ω^0$ are chaotic, we derive a semiclassical trace formula for each spectral component and show that their energy level statistics are the same as in standard Random Matrix ensembles. Depending on whether $α$ is real, pseudo-real or complex, the spectrum has either Gaussian Orthogonal, Gaussian Symplectic or Gaussian Unitary types of statistics, respectively.

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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