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arXiv 0906.2033nlin.CDcond-mat.dis-nn
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对称性交叉量子混沌普适性的半经典理论

Semiclassical Theory for Universality in Quantum Chaos with Symmetry Crossover

Keiji Saito, Taro Nagao, Sebastian Muller, Petr Braun

摘要:

我们解决的量子经典对应的混沌系统之间的交叉对称类。研究弱磁场中经典混沌系统的能级统计。用半经典的双轨道理论计算了谱关联的母函数。一个显式计算到二阶,包括非振荡和振荡的条款,同意随机矩阵理论的预测。给出了高阶项的形式表达式。随机矩阵理论的非线性sigma(NLS)模型,在玻色子复制技巧的变体,也分析了高斯正交系综和高斯酉系综之间的交叉。用周期轨道理论解释了NLS模型的图解展开。

英文摘要:

We address the quantum-classical correspondence for chaotic systems with a crossover between symmetry classes. We consider the energy level statistics of a classically chaotic system in a weak magnetic field. The generating function of spectral correlations is calculated by using the semiclassical periodic-orbit theory. An explicit calculation up to the second order, including the non-oscillatory and oscillatory terms, agrees with the prediction of random matrix theory. Formal expressions of the higher order terms are also presented. The nonlinear sigma (NLS) model of random matrix theory, in the variant of the Bosonic replica trick, is also analyzed for the crossover between the Gaussian orthogonal ensemble and Gaussian unitary ensemble. The diagrammatic expansion of the NLS model is interpreted in terms of the periodic orbit theory.

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