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arXiv 0903.5091nlin.CD
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普适谱统计中曲率效应的半经典起源

The semiclassical origin of curvature effects in universal spectral statistics

Daniel Waltner, Stefan Heusler, Juan Diego Urbina, Klaus Richter

摘要:

我们考虑能量平均的两点相关谱行列式和计算的贡献超出对角近似使用半经典方法。用与[S. Heusler { \textit {等人}}\ 2007年物理学评论快报。{ \textbf{98} },044103]我们发现半经典和随机矩阵理论的结果之间的差异。基于场论方法的补充分析表明,在半经典中出现的附加项在场论中被所谓的曲率效应所抵消。我们给出了半经典解释的曲率效应的贡献,从多个横截的周期轨道周围较短的周期轨道,并讨论了我们的结果与以前的方法的一致性。

英文摘要:

We consider the energy averaged two-point correlator of spectral determinants and calculate contributions beyond the diagonal approximation using semiclassical methods. Evaluating the contributions originating from pseudo-orbit correlations in the same way as in [S. Heusler {\textit {et al.}}\ 2007 Phys. Rev. Lett. {\textbf{98}}, 044103] we find a discrepancy between the semiclassical and the random matrix theory result. A complementary analysis based on a field-theoretical approach shows that the additional terms occurring in semiclassics are cancelled in field theory by so-called curvature effects. We give the semiclassical interpretation of the curvature effects in terms of contributions from multiple transversals of periodic orbits around shorter periodic orbits and discuss the consistency of our results with previous approaches.

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