# Potential Theory for Schrödinger operators on finite networks.

Enrique Bendito; Angeles Carmona; Andrés M. Encinas

Revista Matemática Iberoamericana (2005)

- Volume: 21, Issue: 3, page 771-818
- ISSN: 0213-2230

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topBendito, Enrique, Carmona, Angeles, and Encinas, Andrés M.. "Potential Theory for Schrödinger operators on finite networks.." Revista Matemática Iberoamericana 21.3 (2005): 771-818. <http://eudml.org/doc/41950>.

@article{Bendito2005,

abstract = {We aim here at analyzing the fundamental properties of positive semidefinite Schrödinger operators on networks. We show that such operators correspond to perturbations of the combinatorial Laplacian through 0-order terms that can be totally negative on a proper subset of the network. In addition, we prove that these discrete operators have analogous properties to the ones of elliptic second order operators on Riemannian manifolds, namely the monotonicity, the minimum principle, the variational treatment of Dirichlet problems and the condenser principle. Unlike the continuous case, a discrete Schrödinger operator can be interpreted as an integral operator and therefore a discrete Potential Theory with respect to its associated kernel can be built. We prove that the Schrödinger kernel satisfies enough principles to assure the existence of equilibrium measures for any proper subset. These measures are used to obtain systematic expressions of the Green and Poisson kernels associated with Dirichlet problems.},

author = {Bendito, Enrique, Carmona, Angeles, Encinas, Andrés M.},

journal = {Revista Matemática Iberoamericana},

keywords = {Teoría del potencial; Operadores elípticos; Problemas de valor de frontera; Problema de Dirichlet; discrete Schrödinger operator; finite networks},

language = {eng},

number = {3},

pages = {771-818},

title = {Potential Theory for Schrödinger operators on finite networks.},

url = {http://eudml.org/doc/41950},

volume = {21},

year = {2005},

}

TY - JOUR

AU - Bendito, Enrique

AU - Carmona, Angeles

AU - Encinas, Andrés M.

TI - Potential Theory for Schrödinger operators on finite networks.

JO - Revista Matemática Iberoamericana

PY - 2005

VL - 21

IS - 3

SP - 771

EP - 818

AB - We aim here at analyzing the fundamental properties of positive semidefinite Schrödinger operators on networks. We show that such operators correspond to perturbations of the combinatorial Laplacian through 0-order terms that can be totally negative on a proper subset of the network. In addition, we prove that these discrete operators have analogous properties to the ones of elliptic second order operators on Riemannian manifolds, namely the monotonicity, the minimum principle, the variational treatment of Dirichlet problems and the condenser principle. Unlike the continuous case, a discrete Schrödinger operator can be interpreted as an integral operator and therefore a discrete Potential Theory with respect to its associated kernel can be built. We prove that the Schrödinger kernel satisfies enough principles to assure the existence of equilibrium measures for any proper subset. These measures are used to obtain systematic expressions of the Green and Poisson kernels associated with Dirichlet problems.

LA - eng

KW - Teoría del potencial; Operadores elípticos; Problemas de valor de frontera; Problema de Dirichlet; discrete Schrödinger operator; finite networks

UR - http://eudml.org/doc/41950

ER -