Results 41 to 50 of about 1,194 (210)

Resonance fluorescence in the resolvent-operator formalism

open access: yes, 2017
The Mollow spectrum for the light scattered by a driven two-level atom is derived in the resolvent operator formalism. The derivation is based on the construction of a master equation from the resolvent operator of the atom-field system. We show that the
Harman, Z.   +3 more
core   +1 more source

Logarithm of a Non-Singular Complex Matrix via the Dunford–Taylor Integral

open access: yesAxioms, 2022
Using the Dunford–Taylor integral and a representation formula for the resolvent of a non-singular complex matrix, we find the logarithm of a non-singular complex matrix applying the Cauchy’s residue theorem if the matrix eigenvalues are known or a ...
Diego Caratelli, Paolo Emilio Ricci
doaj   +1 more source

An inverse problem for a second-order differential equation in a Banach space

open access: yesAbstract and Applied Analysis, 2004
We consider the problem of determining the unknown term in the right-hand side of a second-order differential equation with unbounded operator generating a cosine operator function from the overspecified boundary data.
Y. Eidelman
doaj   +1 more source

The spectrum of restricted resolvable designs with r = 2

open access: yesDiscrete Mathematics, 1991
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Time and spectrum-resolving multiphoton correlator for 300–900 nm [PDF]

open access: yesJournal of Applied Physics, 2014
We demonstrate a single-photon sensitive spectrometer in the visible range, which allows us to perform time-resolved and multi-photon spectral correlation measurements at room temperature. It is based on a monochromator composed of two gratings, collimation optics, and an array of single photon avalanche diodes. The time resolution can reach 110 ps and
Johnsen, Kelsey D   +5 more
openaire   +3 more sources

A note on the spectral operators of scalar type and semigroups of bounded linear operators

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
It is shown that, for the spectral operators of scalar type, the well-known characterizations of the generation of C0- and analytic semigroups of bounded linear operators can be reformulated exclusively in terms of the spectrum of such operators, the ...
Marat V. Markin
doaj   +1 more source

Ces\`{a}ro-Type Operator on the Dirichlet Space of the Upper Half Plane

open access: yesCommunications in Advanced Mathematical Sciences, 2023
We construct a Ces\`{a}ro-type operator acting on Dirichlet space of the upper half plane using the approach of strongly continuous semigroups of composition operators on Banach spaces.
Job Bonyo, David Ambogo, Effie Oyugi
doaj   +1 more source

Rotationally resolved electronic spectrum of propadienylidene

open access: yesJournal of Molecular Spectroscopy, 2005
Abstract The rotationally resolved electronic spectrum of a vibrational band in the A ˜ 1 A 2 – X ˜ 1 A 1 transition of the cumulene carbon chain C 3 H 2 was measured in the 625 nm region in a supersonic discharge using cw cavity ring down spectroscopy. The rotational structure was analysed using
Birza, Petre   +4 more
openaire   +2 more sources

Criterion for the resolvent set of nonsymmetric tridiagonal operators

open access: yes, 1995
We study nonsymmetric tridiagonal operators acting in the Hilbert space ℓ 2 {\ell ^2} and describe the spectrum and the resolvent set of such operators in terms of a continued fraction related to the ...
V. Kaliaguine   +2 more
core   +1 more source

Density-functional perturbation theory goes time-dependent

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2008
The scope of time-dependent density-functional theory (TDDFT) is limited to the lowest portion of the spectrum of rather small systems (a few tens of atoms at most).
Gebauer, Ralph   +2 more
doaj   +1 more source

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