Spectrum of a dilated honeycomb network
Mathematical Physics
2019-12-10 v1 Mesoscale and Nanoscale Physics
math.MP
Spectral Theory
Quantum Physics
Abstract
We analyze spectrum of Laplacian supported by a periodic honeycomb lattice with generally unequal edge lengths and a type coupling in the vertices. Such a quantum graph has nonempty point spectrum with compactly supported eigenfunctions provided all the edge lengths are commensurate. We derive conditions determining the continuous spectral component and show that existence of gaps may depend on number-theoretic properties of edge lengths ratios. The case when two of the three lengths coincide is discussed in detail.
Keywords
Cite
@article{arxiv.1405.0694,
title = {Spectrum of a dilated honeycomb network},
author = {Pavel Exner and Ondrej Turek},
journal= {arXiv preprint arXiv:1405.0694},
year = {2019}
}
Comments
21 pages, one figure