Spectral analysis for adjacency operators on graphs

Details Spectral analysis for adjacency operators on graphs Spectral analysis for adjacency operators on graphs

2006-03-07

arxiv.org/abs/math-ph/0603020v1

Physics

Mathematical Physics

16 pages, 9 figures

Scientific paper

10.1007/s00023-007-0339-3

We put into evidence graphs with adjacency operator whose singular subspace is prescribed by the kernel of an auxiliary operator. In particular, for a family of graphs called admissible, the singular continuous spectrum is absent and there is at most an eigenvalue located at the origin. Among other examples, the one-dimensional XY model of solid-state physics is covered. The proofs rely on commutators methods.

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