Results 11 to 20 of about 112,539 (200)

Semi-classical calculations of energy levels and wave functions of hamiltonian systems with one and several degrees of freedom based on the method of classical and quantum normal forms

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
The paper presents two schemes for the sequential construction of the classical normal form and its quantum analogue for some classes of classical Hamiltonian systems.
I.N. Belyaeva   +3 more
doaj   +1 more source

Entropy of Eigenfunctions [PDF]

open access: yes, 2009
We study the high--energy limit for eigenfunctions of the laplacian, on a compact negatively curved manifold. We review the recent result of Anantharaman-Nonnenmacher giving a lower bound on the Kolmogorov-Sinai entropy of semiclassical measures, and improve this lower bound in the case of variable negative curvature.
Anantharaman, Nalini   +2 more
openaire   +3 more sources

Eigenfunction statistics for a point scatterer on a three-dimensional torus [PDF]

open access: yes, 2012
In this paper we study eigenfunction statistics for a point scatterer (the Laplacian perturbed by a delta-potential) on a three-dimensional flat torus.
A. Schnirelman   +10 more
core   +1 more source

Matching the LBO Eigenspace of Non-Rigid Shapes via High Order Statistics

open access: yesAxioms, 2014
A fundamental tool in shape analysis is the virtual embedding of the Riemannian manifold describing the geometry of a shape into Euclidean space. Several methods have been proposed to embed isometric shapes into flat domains, while preserving the ...
Alon Shtern, Ron Kimmel
doaj   +1 more source

Zeros of eigenfunctions of some anharmonic oscillators [PDF]

open access: yes, 2006
We study eigenfunctions of Schrodinger operators -y"+Py on the real line with zero boundary conditions, whose potentials P are real even polynomials with positive leading coefficients.
Eremenko, Alexandre   +2 more
core   +8 more sources

The Regularized Trace Formula Of A Second Order Differentıal Equation Given With Anti-Perıodic Boundary Conditions

open access: yesCumhuriyet Science Journal, 2019
In this study, we examined the formula of the regularizedtrace of the self-adjoint operator which is formed bydifferentialexpression and anti-periodic boundary condition.
Seda Kızılbudak Çalışkan   +1 more
doaj   +1 more source

Bounds on supremum norms for Hecke eigenfunctions of quantized cat maps [PDF]

open access: yes, 2006
We study extreme values of desymmetrized eigenfunctions (so called Hecke eigenfunctions) for the quantized cat map, a quantization of a hyperbolic linear map of the torus.
Kurlberg, Par
core   +3 more sources

Analysis and methodology of determining the norm of eigenfunctions as a limit transition in the scalar product in the spectral Stourm-Louvile problem for a photonic one-dimensional crystal

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023
Relevance The last of the decades (approximately from the 90s of the 20th century) to rapid grow of photonics. That's why, firstly, relevance this work is related to relevance diffraction problems for the structures of optics ranges (photonic crystal ...
О.V. Kazanko, О.E. Penkina
doaj   +1 more source

Construction of Eigenfunctions to One Nonlocal Second-Order Differential Operator with Double Involution

open access: yesAxioms, 2022
In this paper, we study the eigenfunctions to one nonlocal second-order differential operator with double involution. We give an explicit form of the eigenfunctions to the boundary value problem in the unit ball with Dirichlet conditions on the boundary.
Batirkhan Turmetov, Valery Karachik
doaj   +1 more source

Uniform localization is always uniform [PDF]

open access: yes, 2015
In this note we show that if a family of ergodic Schr\"odinger operators on $l^2({\Bbb Z}^\gamma)$ with continuous potentials have uniformly localized eigenfunctions then these eigenfunctions must be uniformly localized in a homogeneous ...
Han, Rui
core   +3 more sources

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