Topological Resonances on Quantum Graphs
@article{ColindeVerdire2016TopologicalRO, title={Topological Resonances on Quantum Graphs}, author={Yves Colin de Verdi{\`e}re and Françoise Truc}, journal={Annales Henri Poincar{\'e}}, year={2016}, volume={19}, pages={1419-1438} }
In this paper, we try to put the results of Smilansky et al. on “Topological resonances” on a mathematical basis. A key role in the asymptotic of resonances near the real axis for Quantum Graphs is played by the set of metrics for which there exist compactly supported eigenfunctions. We give several estimates on the dimension of this semi-algebraic set, in particular in terms of the girth of the graph. The case of trees is also discussed.
11 Citations
Scattering resonances of large weakly open quantum graphs
- MathematicsPure and Applied Analysis
- 2022
In this paper, we consider a sequence of open quantum graphs, with uniformly bounded data, and we are interested in the asymptotic distribution of their scattering resonances. Supposing that the…
Spectrum of a non-selfadjoint quantum star graph
- MathematicsJournal of Physics A: Mathematical and Theoretical
- 2020
We study the spectrum of a quantum star graph with a non-selfadjoint Robin condition at the central vertex. We first prove that, in the high frequency limit, the spectrum of the Robin Laplacian is…
Nodal Statistics on Quantum Graphs
- Mathematics
- 2017
It has been suggested that the distribution of the suitably normalized number of zeros of Laplacian eigenfunctions contains information about the geometry of the underlying domain. We study this…
Eigenspaces of symmetric graphs are not typically irreducible
- Mathematics
- 2018
We construct rich families of Schrödinger operators on symmetric graphs, both quantum and combinatorial, whose spectral degeneracies are persistently larger than the maximal dimension of an…
Knots and signal transmission in topological quantum devices
- PhysicsJournal of Physics A: Mathematical and Theoretical
- 2021
We discuss the basic problem of signal transmission in quantum mechanics in terms of topological theories. Using the analogy between knot diagrams and quantum amplitudes we show how one can define…
On the multilevel internal structure of the asymptotic distribution of resonances
- MathematicsJournal of Differential Equations
- 2019
Standing waves for the NLS on the double-bridge graph and a rational–irrational dichotomy
- MathematicsJournal of Differential Equations
- 2019
Non-compact Quantum Graphs with Summable Matrix Potentials
- Mathematics
- 2020
Let $$\mathcal {G}$$ G be a metric non-compact connected graph with finitely many edges. The main object of the paper is the Hamiltonian $$\mathbf{H}_{\alpha }$$ H α associated in $$L^2(\mathcal…
On Pleijel’s Nodal Domain Theorem for Quantum Graphs
- MathematicsAnnales Henri Poincaré
- 2021
We establish metric graph counterparts of Pleijel’s theorem on the asymptotics of the number of nodal domains νn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym}…
Non-compact Quantum Graphs with Summable Matrix Potentials
- Materials ScienceAnnales Henri Poincaré
- 2020
Let G\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek}…
References
SHOWING 1-10 OF 16 REFERENCES
Equivalence of resolvent and scattering resonances on quantum graphs
- Mathematics
- 2006
We discuss resonances for Schrodinger operators on metric graphs which consists of a finite compact part and a finite number of halflines attached to it; the vertex coupling is assumed to be of the…
Non-Weyl resonance asymptotics for quantum graphs
- Mathematics
- 2010
We consider the resonances of a quantum graph G that consists of a compact part with one or more infinite leads attached to it. We discuss the leading term of the asymptotics of the number of…
Resonances from perturbations of quantum graphs with rationally related edges
- Mathematics
- 2010
We discuss quantum graphs consisting of a compact part and semi-infinite leads. Such a system may have embedded eigenvalues if some edge lengths in the compact part are rationally related. If such a…
Semi-classical measures on Quantum Graphs and the Gauss map of the determinant manifold
- Mathematics
- 2013
In this paper, I describe the weak limits of the measures associated to the eigenfunctions of the Laplacian on a Quantum graph for a generic metric in terms of the Gauss map of the determinant…
A Fermi golden rule for quantum graphs
- Mathematics, Physics
- 2016
We present a Fermi golden rule giving rates of decay of states obtained by perturbing embedded eigenvalues of a quantum graph. To illustrate the procedure in a notationally simpler setting we also…
Chaotic scattering on graphs
- PhysicsPhysical review letters
- 2000
This work derives exact expressions for the scattering matrix, and an exact trace formula for the density of resonances, in terms of classical orbits, analogous to the semiclassical theory of chaotic scattering.
RELATIONSHIP BETWEEN SCATTERING MATRIX AND SPECTRUM OF QUANTUM GRAPHS
- Mathematics
- 2008
AbstractWe investigate the equivalence between spectral characteristics of the Laplace op-erator on a metric graph, and the associated unitary scattering operator. We provethat the statistics of…
Topological resonances in scattering on networks (graphs).
- PhysicsPhysical review letters
- 2013
A hitherto unnoticed type of resonances occurring in scattering from networks (quantum graphs) which are due to the complex connectivity of the graph-its topology are reported, and analytical arguments supported by numerical simulation are provided.
On the Level Spacing Distribution in Quantum Graphs
- Mathematics, Physics
- 2000
We derive a formula for the level spacing probability distribution in quantum graphs. We apply it to simple examples and we discuss its relation with previous work and its possible application in…