Results 31 to 40 of about 2,208 (153)
Time symmetry in Rigged Hilbert Spaces [PDF]
, 2000 Despite the fact that the fundamental physical laws are symmetric in time, most observed processes do not show this symmetry. Especially the phenomenon of decay seems to involve a kind of irreversibility that makes the definition of a microscopic arrow of time possible.
Kim J. Bostroem
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Lévy--Laplace Operators in Functional Rigged Hilbert Spaces [PDF]
Mathematical Notes, 2002 This paper is devoted to the analytical properties of the Lévy-Laplace operator (the Lévy Laplacian) and the semigroups generated by this operator. Here the authors present new results which are based on the properties of the Lévy-Volterra operators.
Luigi Accardi, O. G. Smolyanov
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A constructive presentation of rigged Hilbert spaces [PDF]
Journal of Physics: Conference Series, 2015 9 pages, 7th Int. Workshop DICE2014, Sept. 15-19, 2014, Castiglioncello (Italy)
E. Celeghini
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Spherical harmonics and rigged Hilbert spaces [PDF]
Journal of Mathematical Physics, 2018 This paper is devoted to study discrete and continuous bases for spaces supporting representations of SO(3) and SO(3, 2) where the spherical harmonics are involved. We show how discrete and continuous bases coexist on appropriate choices of rigged Hilbert spaces. We prove the continuity of relevant operators and the operators in the algebras spanned by
E. Celeghini, M. Gadella, M. A. del Olmo
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Rigged Hilbert Space Treatment of Continuous Spectrum [PDF]
Fortschritte der Physik, 2002 RevTex, 32 ...
de la Madrid, R., Bohm, A., Gadella, M.
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Rigged Hilbert Space Resonances and Time Asymmetric Quantum Mechanics [PDF]
, 1999 The Rigged Hilbert Space (RHS) theory of resonance scattering and decay is reviewed and contrasted with the standard Hilbert space (HS) theory of quantum mechanics. The main difference is in the choice of boundary conditions. Whereas the conventional theory allows for the in-states $ ^+$ and the out-states (observables) $ ^-$ of the S-matrix elements
Arno Böhm, H. Kaldass
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On ultraproducts, the spectral theorem and rigged Hilbert spaces [PDF]
The Journal of Symbolic Logic, 2020 Abstract We start by showing how to approximate unitary and bounded self-adjoint operators by operators in finite dimensional spaces. Using ultraproducts we give a precise meaning for the approximation. In this process we see how the spectral measure is obtained as an ultralimit of counting measures that arise naturally from the finite dimensional ...
Åsa Hirvonen, Tapani Hyttinen
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International Journal for Numerical Methods in Engineering, Volume 124, Issue 13, Page 2935-2964, 15 July 2023., 2023 Abstract This work deals with shape optimization for contact mechanics. More specifically, the linear elasticity model is considered under the small deformations hypothesis, and the elastic body is assumed to be in contact (sliding or with Tresca friction) with a rigid foundation.
Bastien Chaudet‐Dumas
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IET Science, Measurement &Technology, Volume 16, Issue 9, Page 523-532, November 2022., 2022 Abstract In this paper, a new technique based on the manipulation of stator current signature for induction machines fault diagnosis is introduced. The goal of the proposed method is to demodulate the characteristic frequencies from supply frequency and preserve the information of the supply frequency and its harmonics.
Mohammad Hoseintabar Marzebali +3 more
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Time Asymmetric Quantum Mechanics and Shock Waves: Exploring the Irreversibility in Nonlinear Optics [PDF]
, 2017 The description of irreversible phenomena is a still debated topic in quantum mechanics. Still nowadays, there is no clear procedure to distinguish the coupling with external baths from the intrinsic irreversibility in isolated systems.
Aglietti +55 more
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