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arXiv 0901.4383math.DSmath.SP
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弱耦合Fibonacci哈密顿量的谱

The Spectrum of the Weakly Coupled Fibonacci Hamiltonian

David Damanik, Anton Gorodetski

摘要:

我们考虑的耦合常数的小值的斐波那契哈密顿量的频谱。已知这个集合是一个勒贝格测度为零的康托尔集。在这里,我们研究的极限,当耦合常数的值接近零,其厚度和豪斯多夫维数。我们宣布以下结果,并解释一些关键的想法,进入他们的证明。厚度趋于无穷大,因此,频谱的豪斯多夫维数趋于1。此外,每个间隙的长度线性地趋于零。最后,对于足够小的耦合,频谱与自身的和是一个区间。这最后一个结果提供了一个严格的解释现象的斐波那契平方格发现的数字埃文达尔曼德尔和Lifshitz。

英文摘要:

We consider the spectrum of the Fibonacci Hamiltonian for small values of the coupling constant. It is known that this set is a Cantor set of zero Lebesgue measure. Here we study the limit, as the value of the coupling constant approaches zero, of its thickness and its Hausdorff dimension. We announce the following results and explain some key ideas that go into their proofs. The thickness tends to infinity and, consequently, the Hausdorff dimension of the spectrum tends to one. Moreover, the length of every gap tends to zero linearly. Finally, for sufficiently small coupling, the sum of the spectrum with itself is an interval. This last result provides a rigorous explanation of a phenomenon for the Fibonacci square lattice discovered numerically by Even-Dar Mandel and Lifshitz.

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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