Results 21 to 30 of about 77,145 (154)

The rigged Hilbert space approach to the Lippmann-Schwinger equation. Part II: The analytic continuation of the Lippmann-Schwinger bras and kets [PDF]

open access: green, 2006
The analytic continuation of the Lippmann-Schwinger bras and kets is obtained and characterized. It is shown that the natural mathematical setting for the analytic continuation of the solutions of the Lippmann-Schwinger equation is the rigged Hilbert ...
Bohm A   +12 more
core   +2 more sources

Spherical harmonics and rigged Hilbert spaces [PDF]

open access: greenJournal 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
openalex   +6 more sources

SU(2), Associated Laguerre Polynomials and Rigged Hilbert Spaces [PDF]

open access: yes, 2018
We present a family of unitary irreducible representations of SU(2) realized in the plane, in terms of the Laguerre polynomials. These functions are similar to the spherical harmonics defined on the sphere.
Celeghini, Enrico   +2 more
core   +6 more sources

Rigged Hilbert spaces in quantum mechanics [PDF]

open access: greenCommunications in Mathematical Physics, 1966
It is shown how rigged Hilbert spaces may be constructed in quantum mechanics, and the properties of the resulting spaces are derived. The theory is applied to non-relativistic quantum systems ofn interacting particles. The spectral theory in rigged Hilbert spaces is developed and the results necessary for the application to the Dirac formalism are ...
John E. Roberts
openalex   +4 more sources

Rigged Hilbert space approach for non-Hermitian systems with positive definite metric [PDF]

open access: yesJournal of Mathematics and Physics, 2022
We investigate Dirac’s bra–ket formalism based on a rigged Hilbert space for a non-Hermitian quantum system with a positive-definite metric. First, the rigged Hilbert space, characterized by a positive-definite metric, is established. With the aid of the
S. Ohmori, J. Takahashi
semanticscholar   +1 more source

Orthogonal polynomials and rigged Hilbert space

open access: bronzeJournal of Functional Analysis, 1986
AbstractA duality correspondence is set up between polynomials satisfying a recurrence relation and the generalized eigenvectors of a Jacobi operator in a rigged Hilbert space. In the case of a symmetric recurrence a ready consequence of that correspondence is an alternative proof of Favard's Theorem and the Representation Theorem.
Domenico P. L. Castrigiano
openalex   +3 more sources

Time symmetry in Rigged Hilbert Spaces

open access: green, 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
openalex   +4 more sources

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