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"Mixed spectral nature" of Thue--Morse Hamiltonian

Mathematical Physics 2016-01-25 v2 Dynamical Systems math.MP Spectral Theory

Abstract

We find three dense subsets ΣI,ΣII\Sigma_I,\Sigma_{II} and ΣIII\Sigma_{III} of the spectrum of the Thue-Morse Hamiltonian, such that each energy in ΣI\Sigma_I is extended, each energy in ΣII\Sigma_{II} is pseudo-localized and each energy in ΣIII\Sigma_{III} is one-sided pseudo-localized. We also obtain exact estimations on the norm of the transfer matrices and the norm of the formal solutions for these energies. Especially, for EΣIIΣIII,E\in \Sigma_{II}\cup\Sigma_{III}, the norms of the transfer matrices behave like ec1γnTn(E)ec2γn. e^{c_1\gamma\sqrt{n}}\le\|T_{n}(E)\|\le e^{c_2\gamma\sqrt{n}}. The local dimensions of the spectral measure on these subsets are also studied. The local dimension is 00 for energy in ΣII\Sigma_{II} and is larger than 11 for energy in ΣIΣIII.\Sigma_{I}\cup\Sigma_{III}. In summary, the Thue-Morse Hamiltonian exhibits "mixed spectral nature".

Keywords

Cite

@article{arxiv.1512.08011,
  title  = {"Mixed spectral nature" of Thue--Morse Hamiltonian},
  author = {Qinghui Liu and Yanhui Qu and Xiao Yao},
  journal= {arXiv preprint arXiv:1512.08011},
  year   = {2016}
}

Comments

50 pages, Comments are welcome!