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In this paper we obtain asymptotic formulas of arbitrary order for the Bloch eigenvalues and Bloch functions of the Schrodinger operator of arbitrary dimension, with periodic, with respect to arbitrary lattice, potential. Moreover, we…

Mathematical Physics · Physics 2007-05-23 O. A. Veliev

We establish a semi-classical formula for the sum of eigenvalues of a magnetic Schrodinger operator in a three-dimensional domain with compact smooth boundary and Neumann boundary conditions. The eigenvalues we consider have eigenfunctions…

Analysis of PDEs · Mathematics 2014-09-18 Marwa Nasrallah

We study the ground state energy of the Neumann magnetic Laplacian on planar domains. For a constant magnetic field we consider the question whether, under an assumption of fixed area, the disc maximizes this eigenvalue. More generally, we…

Spectral Theory · Mathematics 2018-05-16 Soeren Fournais , Bernard Helffer

This paper is concerned with the discrete spectrum of the self-adjoint realization of the semi-classical Schr\"odinger operator with constant magnetic field and associated with the de Gennes (Fourier/Robin) boundary condition. We derive an…

Spectral Theory · Mathematics 2015-05-13 Ayman Kachmar

We study the bottom of the spectrum of a magnetic hamiltonian with axisymmetrical potential in R3. The associated magnetic field is planar, unitary and non-constant. The problem reduces to a 1D-family of singular Sturm-Liouville operators…

Spectral Theory · Mathematics 2013-09-25 Nicolas Popoff

We determine accurate asymptotics of the lowest eigenvalue for the Laplace operator with a smooth magnetic field and Robin boundary conditions in a smooth 3D domain, when the Robin parameter tends to $+\infty$. Our results identify a…

Spectral Theory · Mathematics 2020-05-11 Bernard Helffer , Ayman Kachmar , Nicolas Raymond

We determine a counterexample to strong diamagnetism for the Laplace operator in the unit disc with a uniform magnetic field and Robin boundary condition. The example follows from the accurate asymptotics of the lowest eigenvalue when the…

Spectral Theory · Mathematics 2020-08-26 Ayman Kachmar , Mikael P. Sundqvist

We investigate quantitative unique continuation properties for discrete magnetic Schr{\"o}dinger operators in certain periodic graphs. This unique continuation property will be quantified through what is known in the literature as a Three…

Classical Analysis and ODEs · Mathematics 2025-03-19 Philippe Jaming , Yann Bourroux , Aingeru Fernández-Bertolin

Inspired by a paper by T. Chakradhar, K. Gittins, G. Habib and N. Peyerimhoff, we analyze their conjecture that the ground state energy of the magnetic Dirichlet-to-Neumann operator on the disk tends to $+\infty$ as the magnetic field tends…

Analysis of PDEs · Mathematics 2025-02-21 Helffer Bernard , Nicoleau François

Sharp spectral asymptotics for multidimensional Schroedinger operators with the strong magnetic field are derived under rather weak smoothness conditions. I assume that magnetic intensity matrix has constant defect r>0 at each point. In…

Analysis of PDEs · Mathematics 2011-08-03 Victor Ivrii

We study the asymptotic behavior, as Planck's constant $\hbar\to 0$, of the number of discrete eigenvalues and the Riesz means of Pauli and Dirac operators with a magnetic field $\mu\mathbf{B}(x)$ and an electric field. The magnetic field…

Mathematical Physics · Physics 2007-05-23 A. A. Balinsky , W. D. Evans , Roger T. Lewis

We consider the Neumann realization of the magnetic laplacian in $\mathbb{R}^3_+$, in the case in which the magnetic field has a piecewise constant strength and a uniform direction. This operator is expected to be an effective model in…

Analysis of PDEs · Mathematics 2022-07-29 Emanuela L. Giacomelli

This paper is devoted to the asymptotic analysis of the eigenvalues of the Laplace operator with a strong magnetic field and Robin boundary condition on a smooth planar domain and with a negative boundary parameter. We study the singular…

Spectral Theory · Mathematics 2022-02-15 Rayan Fahs

An upper estimate for the number of negative eigenvalues below the essential spectrum for the magnetic Schr\"odinger operator with Aharonov-Bohm magnetic field in a strip is obtained. Its further shown that the estimate does not hold in…

Mathematical Physics · Physics 2021-06-17 Ben Sorowen

Let $H_{0, D}$ (resp., $H_{0,N}$) be the Schroedinger operator in constant magnetic field on the half-plane with Dirichlet (resp., Neumann) boundary conditions, and let $H_\ell : = H_{0, \ell} - V$, $\ell =D,N$, where the scalar potential…

Spectral Theory · Mathematics 2012-12-11 Vincent Bruneau , Pablo Miranda , Georgi Raikov

We consider 2-dimensional Schroedinger operator with the non-degenerating magnetic field in the domain with the boundary and under certain non-degeneracy assumptions we derive spectral asymptotics with the remainder estimate better than…

Spectral Theory · Mathematics 2010-05-05 Victor Ivrii

We consider the Schr\"odinger operator with a periodic potential on a quasi 1D continuous periodic model of armchair nanotubes in $\R^3$ in a uniform magnetic field (with amplitude $B\in \R$), which is parallel to the axis of the nanotube.…

Spectral Theory · Mathematics 2008-04-02 Evgeny Korotyaev , Andrey Badanin

We study the eigenvalues of the magnetic Schroedinger operator associated with a magnetic potential A and a scalar potential q, on a compact Riemannian manifold M, with Neumann boundary conditions if the boundary is not empty. We obtain…

Differential Geometry · Mathematics 2017-09-28 Bruno Colbois , Ahmad El Soufi , Said Ilias , Alessandro Savo

We continue our study of a magnetic Schr\"odinger operator on a two-dimensional compact Riemannian manifold in the case when the minimal value of the module of the magnetic field is strictly positive. We analyze the case when the magnetic…

Spectral Theory · Mathematics 2011-03-23 Bernard Helffer , Yuri A. Kordyukov

This paper is devoted to the study of the two-dimensional Dirac-Coulomb operator in presence of an Aharonov-Bohm external magnetic potential. We characterize the highest intensity of the magnetic field for which a two-dimensional magnetic…

Analysis of PDEs · Mathematics 2020-11-03 Jean Dolbeault , Maria J. Esteban , Michael Loss