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This article is devoted the semiclassical spectral analysis of the Neumann magnetic Laplacian on a smooth bounded domain in three dimensions. Under a generic assumption on the variable magnetic field (involving a localization of the…

Spectral Theory · Mathematics 2023-07-03 Khaled Abou Alfa , Maha Aafarani , Frédéric Hérau , Nicolas Raymond

In this paper we are interested in the semi-classical estimates of the spectrum of the Neumann Laplacian in dimension 3. This work aims to present a complementary case to the one presented in the paper of Helffer and Morame in the case of…

Mathematical Physics · Physics 2009-06-23 Nicolas Raymond

We prove various estimates for the first eigenvalue of the magnetic Dirichlet Laplacian on a bounded domain in two dimensions. When the magnetic field is constant, we give lower and upper bounds in terms of geometric quantities of the…

Spectral Theory · Mathematics 2015-01-23 Tomas Ekholm , Hynek Kovarik , Fabian Portmann

In this paper, we study the first eigenvalue of the magnetic Laplacian with Neumann boundary conditions in the unit disk $\mathbb D$ in $\mathbb R^2$. There is a rather complete asymptotic analysis when the constant magnetic field tends to…

Spectral Theory · Mathematics 2025-08-25 Bernard Helffer , Corentin Léna

This paper is devoted to the spectral analysis of the Laplacian with constant magnetic field on a cone of aperture $\alpha$ and Neumann boundary condition. We analyze the influence of the orientation of the magnetic field. In particular,…

Analysis of PDEs · Mathematics 2013-09-11 Virginie Bonnaillie-Noël , Nicolas Raymond

On a compact Riemannian manifold $M$ with boundary, we give an estimate for the eigenvalues $(\lambda\_k(\tau,\alpha))\_k$ of the magnetic Laplacian with the Robin boundary conditions. Here, $\tau$ is a positive number that defines the…

Differential Geometry · Mathematics 2018-01-12 Georges Habib , Ayman Kachmar

We study the Laplacian with zero magnetic field acting on complex functions of a planar domain $\Omega$, with magnetic Neumann boundary conditions. If $\Omega$ is simply connected then the spectrum reduces to the spectrum of the usual…

Spectral Theory · Mathematics 2020-06-24 Bruno Colbois , Alessandro Savo

The aim of this paper is give a simple proof of some results in \cite{Jun Ling-2006-IJM} and \cite{JunLing-2007-AGAG}, which are very deep studies in the sharp lower bound of the first eigenvalue in the Laplacian operator on compact…

Differential Geometry · Mathematics 2015-06-11 Yue He

We study the magnetic Laplacian in a two-dimensional exterior domain with Neumann boundary condition and uniform magnetic field. For the exterior of the disk we establish accurate asymptotics of the low-lying eigenvalues in the weak…

Spectral Theory · Mathematics 2024-05-29 Ayman Kachmar , Vladimir Lotoreichik , Mikael Sundqvist

We consider a Riemannian cylinder endowed with a closed potential 1-form A and study the magnetic Laplacian with magnetic Neumann boundary conditions associated with those data. We establish a sharp lower bound for the first eigenvalue and…

Differential Geometry · Mathematics 2017-09-28 Bruno Colbois , Alessandro Savo

We study the 3D Neuman magnetic Laplacian in the presence of a semi-classical parameter and a non-uniform magnetic field with constant intensity. We determine a sharp two term asymptotics for the lowest eigenvalue, where the second term…

Spectral Theory · Mathematics 2022-04-22 Bernard Helffer , Ayman Kachmar

We establish accurate eigenvalue asymptotics and, as a by-product, sharp estimates of the splitting between two consecutive eigenvalues, for the Dirichlet magnetic Laplacian with a non-uniform magnetic field having a jump discontinuity…

Mathematical Physics · Physics 2024-03-13 Wafaa Assaad , Bernard Helffer , Ayman Kachmar

This article deals with the spectral analysis of the semiclassical Neumann magnetic Laplacian on a smooth bounded domain in dimension three. When the magnetic field is constant and in the semiclassical limit, we establish a four-term…

Spectral Theory · Mathematics 2022-03-14 Frédéric Hérau , Nicolas Raymond

In this paper we give a detailed asymptotic formula for the lowest eigenvalue of the magnetic Neumann Schr\"odinger operator in the ball in three dimensions with constant magnetic field, as the strength of the magnetic field tends to…

Mathematical Physics · Physics 2009-11-26 S. Fournais , M. Persson

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

We consider the eigenvalues of the magnetic Laplacian on a bounded domain $\Omega$ of $\mathbb R^2$ with uniform magnetic field $\beta>0$ and magnetic Neumann boundary conditions. We find upper and lower bounds for the ground state energy…

Spectral Theory · Mathematics 2023-05-05 Bruno Colbois , Corentin Léna , Luigi Provenzano , Alessandro Savo

We determine accurate asymptotics for the low-lying eigenvalues of the Robin Laplacian when the Robin parameter goes to $-\infty$. The two first terms in the expansion have been obtained by K. Pankrashkin in the $2D$-case and by K.…

Spectral Theory · Mathematics 2015-04-30 Bernard Helffer , Ayman Kachmar

Previous works provided several counterexamples to monotonicity of the lowest eigenvalue for the magnetic Laplacian in the two-dimensional case. However, the three-dimensional case is less studied. We use the results obtained by Helffer,…

Spectral Theory · Mathematics 2022-09-21 Germán Miranda

We investigate how the lowest eigenvalue of a magnetic Laplacian depends on the geometry of a planar domain with a disk shaped hole, where the magnetic field is generated by a singular flux. Under Dirichlet boundary conditions on the inner…

Analysis of PDEs · Mathematics 2025-05-14 Mrityunjoy Ghosh , Ayman Kachmar

The magnetic Laplacian on a planar domain under a strong constant magnetic field has eigenvalues close to the Landau levels. We study the case when the domain is a disc and the spectrum consists of branches of eigenvalues of one dimensional…

Spectral Theory · Mathematics 2024-07-17 Ayman Kachmar , Germán Miranda
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