Mathematical predominance of Dirichlet condition for the one-dimensional Coulomb potential

Abstract

We restrict a quantum particle under a coulombian potential (i.e., the Schrödinger operator with inverse of the distance potential) to three dimensional tubes along the x-axis and diameter $\epsilon$, and study the confining limit $\epsilon \to 0$. In the repulsive case we prove a strong resolvent convergence to a one-dimensional limit operator, which presents Dirichlet boundary condition at the origin. Due to the possibility of the falling of the particle in the center of force, in the attractive case we need to regularize the potential and also prove a norm resolvent convergence to the Dirichlet operator at the origin. Thus, it is argued that, among the infinitely many self-adjoint realizations of the corresponding problem in one dimension, the Dirichlet boundary condition at the origin is the reasonable one-dimensional limit.

30 pages; no figures

References in corpus (5)

• Self-adjoint extensions of Coulomb systems in 1,2 and 3 dimensions
• Effective Hamiltonians for Thin Dirichlet Tubes with Varying Cross-Section
• Solutions to the 1d Klein-Gordon equation with cutoff Coulomb potentials
• On the two-dimensional Coulomb-like potential with a central point interaction
• Quantum singular operator limits of thin Dirichlet tubes via $\Gamma$-convergence

Cited by in corpus (4)

• Chemistry in One Dimension
• Molecular electronic structure in one-dimensional Coulomb systems
• Quantum graphs: Coulomb-type potentials and exactly solvable models
• On the existence of impurity bound excitons in one-dimensional systems with zero range interactions