Results 11 to 20 of about 120,508 (261)
ON THE POST-LINEAR QUADRUPOLE-QUADRUPOLE METRIC
Revista de Matemática: Teoría y Aplicaciones, 2017 The Hartle-Thorne metric defines a reliable spacetime for most astrophysical purposes, for instance simulations of slowly rotating stars. Solving the Einstein field equations, we added terms of second order in the quadrupole moment to its post-linear ...
FRANCISCO FRUTOS ALFARO, MICHAEL SOFFEL
doaj +5 more sources
Quasiperiodic quadrupole insulators
SciPost PhysicsHigher-order topological insulators are an intriguing new family of topological states that host lower-dimensional boundary states. Concurrently, quasiperiodic systems have garnered significant interest due to their complex localization and topological ...
Raul Liquito, Miguel Gonçalves, Eduardo V. Castro
doaj +3 more sources
Quadrupole topological photonic crystals [PDF]
Nature Communications, 2020 Most higher order topological phases are realized by emulations of tight binding models. Extending these concepts to continuum theories requires the identification of invariants describing the bulk multipole order.
Li He +3 more
doaj +4 more sources
The onset of chaos with a quadrupole-quadrupole interaction [PDF]
Il Nuovo Cimento A, 1995 The transition from order to chaos in atomic nuclei has been studied analytically and numerically using a quadrupole--quadrupole residual interaction. This interaction leads to chaotic behaviour, but the critical energy $E_C\simeq 12.6$ MeV, corresponding to the onset of chaos, is higher than that of the experimental one.
MANFREDI VR, SALASNICH, LUCA
openaire +3 more sources
Systematics of the Quadrupole–Quadrupole Interaction and Convergence Properties [PDF]
Annals of Physics, 1999 Our main concern in this work is to show how higher shell admixtures affect the spectrum of a Q.Q interaction. We first review how, in the valence space, the familiar SU(3) result for the energy spectrum can be obtained using a coordinate space Q.Q interaction rather than the Elliott one which is symmetric in r and p.
Fayache, M.S. +3 more
openaire +3 more sources
Circular Geodesics in a New Generalization of q-Metric
Universe, 2022 This paper introduces an alternative generalization of the static solution with quadrupole moment, the q-metric, that describes a deformed compact object in the presence of the external fields characterized by multipole moments.
Shokoufe Faraji
doaj +1 more source
MODEL OF THE FLAT FAIRING ANTENNA DIELECTRIC LAYER WITH AERODYNAMIC HEATING
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2023 To protect the antenna systems of modern aircraft, radio-transparent dielectric fairings are widely used. At low flight speeds, when designing and evaluating the characteristics of the fairing-antenna, it is assumed that the dielectric constant is a ...
Valerii Kozlovskiy +4 more
doaj +1 more source
Skew Quadrupole Effect of Laser Plasma Electron Beam Transport
Applied Sciences, 2019 Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free electron laser and future colliders.
Driss Oumbarek Espinos +19 more
doaj +1 more source
Compact, Broadband, and Omnidirectional Antenna Array for Millimeter-Wave Communication Systems
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021 In this paper, a millimeter-wave printed quadrupole antenna is proposed. It consists of two symmetric printed dipoles that make the quadrupole radiating power omnidirectionally.
Yuanzhi Liu, Mustapha C. E. Yagoub
doaj +1 more source
Two-dimensional three-body quadrupole–quadrupole interactions [PDF]
Journal of Physics B: Atomic, Molecular and Optical Physics, 2021 Abstract The interactions between dipoles are called dipole–dipole interactions. One type of dipole–dipole interaction is van der Waals interaction. Similar to van der Waals interactions, the interactions between quadrupoles are called quadrupole–quadrupole interactions. Atoms can be treated not only as dipoles but also as quadrupoles.
openaire +2 more sources