The absolutely continuous spectrum of the almost Mathieu operator

The absolutely continuous spectrum of the almost Mathieu operator
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DOI:
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发表时间:
2008-10
期刊:
arXiv: Dynamical Systems
影响因子:
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通讯作者:
A. Avila
A. Avila
中科院分区:
其他
文献类型:
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作者:
A. Avila

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我们证明了当且仅当耦合是亚临界时,几乎 Mathieu 算子的谱是绝对连续的。这解决了巴里·西蒙 (Barry Simon) 二十一世纪薛定格算子问题清单中的问题 6。
We prove that the spectrum of the almost Mathieu operator is absolutely continuous if and only if the coupling is subcritical. This settles Problem 6 of Barry Simon's list of Schr\"odinger operator problems for the twenty-first century.