Results 1 to 10 of about 433,155 (229)

Substantiation of asymptotical solution of weakly nonlinear hyperbolic system

open access: yesLietuvos Matematikos Rinkinys, 2023
A hyperbolic system of first order partial differential equations with small parameter and periodical initial conditions is obtained. The uniformly valid in a long time interval asymptotical solution can be constructed using the averaging along ...
Aleksandras Krylovas
doaj   +3 more sources

Binary Gravitational Perturbations and Their Influence on the Habitability of Circumstellar Planets

open access: yesFrontiers in Astronomy and Space Sciences, 2021
In order to assess the habitability of planets in binary star systems, not only astrophysical considerations regarding stellar and atmospheric conditions are needed, but orbital dynamics and the architecture of the system also play an important role. Due
Elke Pilat-Lohinger, Ákos Bazsó
doaj   +1 more source

Tailoring Polarization Conversion in Achiral All-Dielectric Metasurfaces by Using Quasi-Bound States in the Continuum

open access: yesNanomaterials, 2022
Quasi-bound states in the continuum (quasi-BICs) supported in all-dielectric metasurfaces (MTS) are known for their confinement in real space and the notably high values of the quality factor Q.
Jose Luis Pura   +3 more
doaj   +1 more source

Resonant Effect of High-Energy Electron–Positron Pairs Production in Collision of Ultrarelativistic Electrons with an X-ray Electromagnetic Wave

open access: yesUniverse, 2021
The process of resonant high-energy electron–positron pairs production by electrons in an X-ray pulsar electromagnetic field is studied theoretically. Under the resonance conditions, the second-order process under consideration effectively reduces into ...
Georgii K. Sizykh   +2 more
doaj   +1 more source

Measuring α-FPUT Cores and Tails

open access: yesPhysics, 2021
Almost 70 years ago, the Fermi–Pasta–Ulam–Tsingou (FPUT) paradox was formulated in, observed in, and reported using normal modes of a nonlinear, one-dimensional, non-integrable string. Let us recap the paradox.
Sergej Flach
doaj   +1 more source

Resonance enhancement by suitably chosen frequency detuning [PDF]

open access: yes, 2020
In this Letter we report new effects of resonance detuning on various dynamical parameters of a generic 3-wave system. Namely, for suitably chosen values of detuning the variation range of amplitudes can be significantly wider than for exact resonance ...
Dutykh, Denys, Tobisch, Elena
core   +3 more sources

Low‐Frequency Wave Activity in the Ocean—Ross Ice Shelf—Atmosphere System

open access: yesEarth and Space Science, 2023
The main subject of this study is the low‐frequency (with the periods longer than 2 hr) wave processes in the coupled regional system of the Ross Ice Shelf (RIS), the Ross Sea and the atmosphere above them.
N. Zabotin   +6 more
doaj   +1 more source

Scattering and Its Applications to Various Atomic Processes: Elastic Scattering, Resonances, Photoabsorption, Rydberg States, and Opacity of the Atmosphere of the Sun and Stellar Objects

open access: yesAtoms, 2020
A scattering process can be a natural process or a process carried out in a laboratory. The scattering of particles from targets has resulted in important discoveries in physics. We discuss various scattering theories of electrons and positrons and their
Anand K. Bhatia
doaj   +1 more source

Extreme Eigenvalues and the Emerging Outlier in Rank-One Non-Hermitian Deformations of the Gaussian Unitary Ensemble

open access: yesEntropy, 2022
Complex eigenvalues of random matrices J=GUE+iγdiag(1,0,…,0) provide the simplest model for studying resonances in wave scattering from a quantum chaotic system via a single open channel.
Yan V. Fyodorov   +2 more
doaj   +1 more source

The RVP Method—From Real Ab-Initio Calculations to Complex Energies and Transition Dipoles

open access: yesFrontiers in Physics, 2022
The purpose of this review is to describe the rationale behind the RVP (resonance via Padé) approach for calculating energies and widths of resonances, while emphasizing a solid mathematical ground.
Arie Landau   +4 more
doaj   +1 more source

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