The Almost Sure Essential Spectrum of the Doubling Map Model is Connected
The Almost Sure Essential Spectrum of the Doubling Map Model is Connected
复制标题
几乎可以肯定,倍增图模型的基本谱是相连的
DOI:
10.1007/s00220-022-04607-3
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发表时间:
2023
影响因子:
2.4
通讯作者:
Fillman, Jake
中科院分区:
文献类型:
--
作者:
Damanik, David;Fillman, Jake
We consider discrete Schrödinger operators on the half line with potentials generated by the doubling map and continuous sampling functions. We show that the essential spectrum of these operators is always connected. This result is obtained by computing the subgroup of the range of the Schwartzman homomorphism associated with homotopy classes of continuous maps on the suspension of the standard solenoid that factor through the suspension of the doubling map and then showing that this subgroup characterizes the topological structure of the spectrum.
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