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arXiv 1104.4299math-phmath.MP
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非对角Sturmian算子:动力维数和谱维数

On and Off-diagonal Sturmian operator: dynamic and spectral dimension

Laurent Marin

摘要:

我们研究了两种准晶模型,都是Jacobi矩阵的子情形。对于非对角模型,给出了动力学指数的上界和传递矩阵的范数。我们将这一结果应用到非对角Fibonacci哈密顿量,并获得了足够大的耦合的亚弹道界。在对角情况下,我们改进了以前的分形盒维数的谱的下界。

英文摘要:

We study two versions of quasicrystal model, both subcases of Jacobi matrices. For Off-diagonal model, we show an upper bound of dynamical exponent and the norm of the transfer matrix. We apply this result to the Off-diagonal Fibonacci Hamiltonian and obtain a sub-ballistic bound for coupling large enough. In diagonal case, we improve previous lower bounds on the fractal box-counting dimension of the spectrum.

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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