Stability for a system of N fermions plus a different particle with zero-range interactions

M Correggi, G Dell'Antonio, D Finco… - Reviews in …, 2012 - World Scientific
We study the stability problem for a non-relativistic quantum system in dimension three
composed by N≥ 2 identical fermions, with unit mass, interacting with a different particle …

Self-adjoint extensions of restrictions

A Posilicano - arXiv preprint math-ph/0703078, 2007 - arxiv.org
We provide a simple recipe for obtaining all self-adjoint extensions, together with their
resolvent, of the symmetric operator $ S $ obtained by restricting the self-adjoint operator …

A description of all self-adjoint extensions of the Laplacian and Kreĭn-type resolvent formulas on non-smooth domains

F Gesztesy, M Mitrea - Journal d'Analyse Mathématique, 2011 - Springer
This paper has two main goals. First, we are concerned with a description of all self-adjoint
extensions of the Laplacian-Δ| _ C_0^ ∞ (Ω) in L 2 (Ω; dnx). Here, the domain Ω belongs to …

Generalized Robin boundary conditions, Robin-to-Dirichlet maps, and Krein-type resolvent formulas for Schr\" odinger operators on bounded Lipschitz domains

F Gesztesy, M Mitrea - arXiv preprint arXiv:0803.3179, 2008 - arxiv.org
arXiv:0803.3179v2 [math.AP] 15 May 2008 Page 1 arXiv:0803.3179v2 [math.AP] 15 May 2008
GENERALIZED ROBIN BOUNDARY CONDITIONS, ROBIN-TO-DIRICHLET MAPS, AND …

Pauli Hamiltonians with an Aharonov–Bohm flux

W Borrelli, M Correggi, D Fermi - Journal of Spectral Theory, 2024 - ems.press
We study a two-dimensional Pauli operator describing a charged quantum particle with spin
1= 2 moving on a plane in presence of an orthogonal Aharonov–Bohm magnetic flux. We …

[HTML][HTML] Self-adjoint elliptic operators with boundary conditions on not closed hypersurfaces

A Mantile, A Posilicano, M Sini - Journal of Differential Equations, 2016 - Elsevier
The theory of self-adjoint extensions of symmetric operators is used to construct self-adjoint
realizations of a second-order elliptic differential operator on R n with linear boundary …

Boundary triples and Weyl functions for singular perturbations of self-adjoint operators

A Posilicano - arXiv preprint math/0309077, 2003 - arxiv.org
Given the symmetric operator $ A_N $ obtained by restricting the self-adjoint operator $ A $
to $ N $, a linear dense set, closed with respect to the graph norm, we determine a …

Spectral properties of the singular Friedrichs–Lee Hamiltonian

P Facchi, M Ligabò, D Lonigro - Journal of Mathematical Physics, 2021 - pubs.aip.org
We show that the Friedrichs–Lee model, which describes the one-excitation sector of a two-
level atom interacting with a structured boson field, can be generalized to singular atom …

Curvature-induced bound states for a interaction supported by a curve in

P Exner, S Kondej - Annales Henri Poincaré, 2002 - Springer
We study the Laplacian in L^2(R^3) perturbed on an infinite curve Γ by a δ interaction
defined through boundary conditions which relate the corresponding generalized boundary …

The Aharonov-Bohm Hamiltonian: self-adjointness, spectral and scattering properties

D Fermi - arXiv preprint arXiv:2407.15115, 2024 - arxiv.org
This work provides an introduction and overview on some basic mathematical aspects of the
single-flux Aharonov-Bohm Schr\" odinger operator. The whole family of admissible self …