Mild singular potentials as effective Laplacians in narrow strips

2017 ◽  
Vol 120 (1) ◽  
pp. 145
Author(s):  
César R. De Oliveira ◽  
Alessandra A. Verri
Keyword(s):  
Boundary Conditions ◽  
Quadratic Forms ◽  
Dirichlet Boundary ◽  
Schrödinger Operators ◽  
Dirichlet Boundary Conditions ◽  
Schrodinger Operators ◽  
Singular Potentials ◽  
One Dimensional ◽  
Effective Operators

We propose to obtain information on one-dimensional Schrödinger operators on bounded intervals by approaching them as effective operators of the Laplacian in thin planar strips.  Here we develop this idea to get spectral knowledge of some mild singular potentials with Dirichlet boundary conditions.  Special preparations, including a result on perturbations of quadratic forms, are included as well.

scholarly journals HIGHER ORDER TRACE RELATIONS FOR SCHRÖDINGER OPERATORS

1995 ◽  
Vol 07 (06) ◽  
pp. 893-922 ◽  
Author(s):  
F. GESZTESY ◽  
H. HOLDEN ◽  
B. SIMON ◽  
Z. ZHAO
Keyword(s):  
Boundary Condition ◽  
Boundary Conditions ◽  
Trace Formula ◽  
Dirichlet Boundary Condition ◽  
Dirichlet Boundary ◽  
Schrödinger Operators ◽  
Schrodinger Operators ◽  
One Dimensional ◽  
Trace Formulae ◽  
Derivatives Of

We extend the trace formula recently proven for general one-dimensional Schrödinger operators which obtains the potential V(x) from a function ξ(x, λ) by deriving trace relations computing moments of ξ(λ, x) dλ in terms of polynomials in the derivatives of V at x. We describe the relation of those polynomials to KdV invariants. We also discuss trace formulae for analogs of ξ associated with boundary conditions other than the Dirichlet boundary condition underlying ξ.

scholarly journals On a stochastic Burgers equation with Dirichlet boundary conditions

2003 ◽  
Vol 2003 (43) ◽  
pp. 2735-2746 ◽  
Author(s):  
Ekaterina T. Kolkovska
Keyword(s):  
Weak Solution ◽  
Boundary Conditions ◽  
Dirichlet Boundary ◽  
Burgers Equation ◽  
Martingale Problem ◽  
Weak Limit ◽  
Dirichlet Boundary Conditions ◽  
One Dimensional ◽  
Stochastic Burgers Equation ◽  
The One

We consider the one-dimensional Burgers equation perturbed by a white noise term with Dirichlet boundary conditions and a non-Lipschitz coefficient. We obtain existence of a weak solution proving tightness for a sequence of polygonal approximations for the equation and solving a martingale problem for the weak limit.

The eigenvalue gap for one-dimensional Schrödinger operators with symmetric potentials

2009 ◽  
Vol 139 (2) ◽  
pp. 359-366 ◽  
Author(s):  
Min-Jei Huang ◽  
Tzong-Mo Tsai
Keyword(s):  
Boundary Conditions ◽  
Schrödinger Operators ◽  
Neumann Boundary ◽  
Neumann Boundary Conditions ◽  
Schrodinger Operators ◽  
One Dimensional ◽  
Eigenvalue Gap

We consider the eigenvalue gap for Schrödinger operators on an interval with Dirichlet or Neumann boundary conditions. For a class of symmetric potentials, we prove that the gap between the two lowest eigenvalues is maximized when the potential is constant. We also give some related results for doubly symmetric potentials.

scholarly journals Triple solutions for a Dirichlet boundary value problem involving a perturbed discrete p(k)-Laplacian operator

2017 ◽  
Vol 15 (1) ◽  
pp. 1075-1089 ◽  
Author(s):  
Mohsen Khaleghi Moghadam ◽  
Johnny Henderson
Keyword(s):  
Boundary Value Problem ◽  
Boundary Conditions ◽  
Local Minimum ◽  
Dirichlet Boundary ◽  
Dirichlet Boundary Conditions ◽  
Laplacian Operator ◽  
Discrete Problem ◽  
Dirichlet Boundary Value Problem ◽  
One Dimensional ◽  
Minimum Theorem

Abstract Triple solutions are obtained for a discrete problem involving a nonlinearly perturbed one-dimensional p(k)-Laplacian operator and satisfying Dirichlet boundary conditions. The methods for existence rely on a Ricceri-local minimum theorem for differentiable functionals. Several examples are included to illustrate the main results.

scholarly journals On the Spectra of One-Dimensional Schrödinger Operators With Singular Potentials

2019 ◽  
Vol 7 ◽  
Author(s):  
Vladimir S. Rabinovich ◽  
Víctor Barrera-Figueroa ◽  
Leticia Olivera Ramírez
Keyword(s):  
Schrödinger Operators ◽  
Schrodinger Operators ◽  
Singular Potentials ◽  
One Dimensional

scholarly journals Wave operator bounds for one-dimensional Schrödinger operators with singular potentials and applications

2011 ◽  
Vol 52 (1) ◽  
pp. 013505 ◽  
Author(s):  
Vincent Duchêne ◽  
Jeremy L. Marzuola ◽  
Michael I. Weinstein
Keyword(s):  
Wave Operator ◽  
Schrödinger Operators ◽  
Schrodinger Operators ◽  
Singular Potentials ◽  
One Dimensional
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