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arXiv 2603.03460quant-ph
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C3对称弹奏的谱统计和局部化性质

Spectral statistics and localization properties of a $C_3$-symmetric billiard

CAMTP - Center for Applied Mathematics and Theoretical Physics, University of Maribor(马里博尔大学应用数学与理论物理中心)

Matic Orel, Marko Robnik

AI总结:

研究C3对称弹奏的谱统计和局部化性质,通过高精度计算揭示GOE-GUE对应关系并解决谱相关性偏差,分析混沌态的熵局部化分布。

摘要:

我们重新审视Dembowski于2000年引入的C3对称弹奏的谱统计,该弹奏表现出GOE和GUE统计,取决于对称块。使用高精度Beyn的积分方法解决非线性Fredholm特征值问题,并内置不可约子空间分离,我们计算了每个对称子空间中2.8x10^5个特征值,使随机矩阵理论的统计性比较成为可能。改进的谱揭示了清晰的GOE-GUE对应关系,并解决了之前观察到的长程谱相关性偏差。此外,我们通过熵局部化措施的分布分析相空间特征态局部化,对于混沌状态,其分布遵循Beta分布,其标准差随能量呈幂律衰减,与Schnirelman定理描述的量子混沌的出现一致。

英文摘要:

We revisit the spectral statistics of the C$_3$--symmetric billiard introduced by Dembowski [Phys. Rev. E, R4516 (2000)], which exhibits both GOE and GUE statistics depending on the symmetry block. Using high--precision Beyn's contour--integral method for the nonlinear Fredholm eigenvalue problem with built-in separation of irreducible subspaces, we compute 2.8x10$^5$ eigenvalues in each symmetry subspace, enabling statistically meaningful comparisons with random matrix theory. The improved spectra reveal clear GOE--GUE correspondence and resolve previously observed deviations in long--range spectral correlations. Furthermore, we analyze phase--space eigenstate localization through the distribution of entropy localization measures, which, for chaotic states follow a Beta distribution whose standard deviation decays as a power--law with energy, consistent with the onset of quantum ergodicity as described by Schnirelman's theorem.

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