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arXiv math-ph/0405006math-phmath.MP
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渗流哈密顿量的谱分析

Spectral Analysis of Percolation Hamiltonians

Ivan Veselic'

摘要:

研究了渗透图上的邻接算子所对应的Hamilton算子族。我们用紧支本征函数来构造几乎必然是本征值的能量集。这组能量是代数整数的稠密子集。积分态密度恰好在这组能量处具有不连续性。我们表明,收敛的有限盒哈密顿的状态的积分密度的一个在整个空间举行,即使在点的不连续性。为此,我们使用从右等度连续的论证。同样的陈述也适用于将哈密顿量限制在无限簇上。在这种情况下,我们证明了,可以构建的集成状态密度仅使用本地数据。最后,我们研究了一些混合Anderson-Quantum渗流模型,并建立了Wegner,Delyon和Souillard的结果。

英文摘要:

We study the family of Hamiltonians which corresponds to the adjacency operators on a percolation graph. We characterise the set of energies which are almost surely eigenvalues with finitely supported eigenfunctions. This set of energies is a dense subset of the algebraic integers. The integrated density of states has discontinuities precisely at this set of energies. We show that the convergence of the integrated densities of states of finite box Hamiltonians to the one on the whole space holds even at the points of discontinuity. For this we use an equicontinuity-from-the-right argument. The same statements hold for the restriction of the Hamiltonian to the infinite cluster. In this case we prove that the integrated density of states can be constructed using local data only. Finally we study some mixed Anderson-Quantum percolation models and establish results in the spirit of Wegner, and Delyon and Souillard.

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