Results 21 to 30 of about 516 (268)
On the Spectrum of Non-Selfadjoint Schrödinger Operators with Compact Resolvent [PDF]
Communications in Partial Differential Equations, 2015 We determine the Schatten class for the compact resolvent of Dirichlet realizations, in unbounded domains, of a class of non-selfadjoint differential operators. This class consists of operators that can be obtained via analytic dilation from a Schrödinger operator with magnetic field and a complex electric potential.
Almog, Yaniv, Helffer, B
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Time-resolved optical measurements with spread spectrum excitation [PDF]
Optics Letters, 2002 We propose a novel method for measuring time-dependent optical quantities. A train of excitation pulses modulated by a pseudorandom bit sequence is used as the light source, and a cross-correlation scheme is used to retrieve the impulse response. Simulation results of the temporal point-spread function of a diffusive wave are provided, as well as ...
Nan Guang, Chen, Quing, Zhu
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Қарағанды университетінің хабаршысы. Математика сериясыIn the article the spectrum and resolvent of the so-called multichannel systems with nonzero internal energies were investigated. The spectrum and resolvent of multichannel Sturm-Liouville systems with non-zero internal energies mi2 and general boundary
A.A. Valiyev +2 more
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Advances in Mathematical Physics, 2014 A model describing a truncated operator H (truncated with respect to the number of particles) and acting in the direct sum of zero-, one-, and two-particle subspaces of fermionic Fock space FaL2T3 over L2(T3) is investigated.
Zahriddin Muminov +2 more
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Comptes Rendus. Mathématique, 2022 In this paper we perform the analysis of the spectrum of a degenerate operator $A_\varepsilon $ corresponding to the stationary heat equation in a $\varepsilon $-periodic composite medium having two components with high contrast diffusivity.
Sili, Ali
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On the Spectrum of a Morphism of Quotient Hilbert Spaces [PDF]
Surveys in Mathematics and its Applications, 2006 In this paper we define the notion of spectrum for a morphism of quotient Hilbert spaces. The definition is the same with the one given by L.Waelbroeck but the proofs that the spectrum is a compact and nonempty set are different.
Sorin Nadaban
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MathematicsSpectral methods form a cornerstone of linear dynamics, where evolution is resolved into harmonic modes governed by eigenvalues and spectral measures of normal operators.
Rui A. P. Perdigão
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Primary cutaneous anaplastic large cell lymphoma (pcALCL) is a rare pediatric CD30‐positive T‐cell lymphoproliferative disorder with an excellent prognosis, but its genomic drivers are poorly defined. We report three children with skin‐limited disease demonstrating striking molecular heterogeneity, including NPM::ALK, NUP214::FRK, and a novel ...
Shoshana Greenberger +7 more
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Probing multiple-frequency atom-photon interactions with ultracold atoms
New Journal of Physics, 2019 We dress atoms with multiple-radiofrequency (RF) fields and investigate the spectrum of transitions driven by an additional probe field. A complete theoretical description of this rich spectrum is presented, in which we find allowed transitions and ...
K Luksch +6 more
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The phase-resolved high energy spectrum of the crab pulsar [PDF]
Advances in Space Research, 2007 15 pages, 4 figures To appear in Advances in Space Science ...
Cheng, KS +4 more
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