Results 61 to 70 of about 76,709 (184)

Nonlinear equations in private derivatives, related to the operator of Dirak

open access: yesНаука. Инновации. Технологии, 2022
Theory of integrable nonlinear equations possessing soliton solutions of a new type - tipper solitons. The operator examines the design proposed by O.I. Bogoyavlensky, and having attractors in the phase space.
Olga Sergeevna Yanovskaya   +1 more
doaj  

Stability of steady states in kinetic Fokker-Planck equations for Bosons and Fermions

open access: yes, 2007
We study a class of nonlinear kinetic Fokker-Planck type equations modeling quantum particles which obey the Bose-Einstein and Fermi-Dirac statistics, respectively.
Neumann, Lukas, Sparber, Christof
core   +2 more sources

Interaction of exact gravitational waves with matter

open access: yesPhysics Letters B
We consider interactions of exact (i.e., solutions of full nonlinear field equations) gravitational waves with matter by using the Einstein-Boltzmann equation.
Morteza Mohseni, Saurya Das
doaj   +1 more source

Nonlinear Relativistic and Quantum Equations with a Common Type of Solution

open access: yes, 2011
Generalizations of the three main equations of quantum physics, namely, the Schr\"odinger, Klein-Gordon, and Dirac equations, are proposed. Nonlinear terms, characterized by exponents depending on an index $q$, are considered in such a way that the ...
A. D. Polyanin   +10 more
core   +1 more source

Gauge invariant canonical symplectic algorithms for real-time lattice strong-field quantum electrodynamics

open access: yesJournal of High Energy Physics, 2021
A class of high-order canonical symplectic structure-preserving geometric algorithms are developed for high-quality simulations of the quantized Dirac-Maxwell theory based strong-field quantum electrodynamics (SFQED) and relativistic quantum plasmas (RQP)
Qiang Chen, Jianyuan Xiao, Peifeng Fan
doaj   +1 more source

Semiclassical Asymptotics for the Maxwell - Dirac System

open access: yes, 2003
We study the coupled system of Maxwell and Dirac equations from a semiclassical point of view. A rigorous nonlinear WKB-analysis, locally in time, for solutions of (critical) order $O(\sqrt{\epsilon})$ is performed, where the small semiclassical ...
Bechouche   +20 more
core   +3 more sources

The electromagnetic field’s quantum nature and spin

open access: yesAIP Advances
The interaction of the electron (charge) with the electromagnetic field is investigated using the minimum coupling prescription, in which the electron’s spin appears in the Dirac and Pauli–Schrödinger equations.
A. I. Arbab
doaj   +1 more source

Modeling a Quantum Hall System via Elliptic Equations

open access: yesAdvances in Mathematical Physics, 2009
Quantum Hall systems are a suitable theme for a case study in the general area of nanotechnology. In particular, it is a good framework to search for universal principles relevant to nanosystem modeling and nanosystem-specific signal processing. Recently,
Artur Sowa
doaj   +1 more source

Variational methods in relativistic quantum mechanics

open access: yes, 2007
This review is devoted to the study of stationary solutions of linear and nonlinear equations from relativistic quantum mechanics, involving the Dirac operator. The solutions are found as critical points of an energy functional. Contrary to the Laplacian
Esteban, Maria J.   +2 more
core   +2 more sources

The Least Squares Stochastic Finite Element Method in Structural Stability Analysis of Steel Skeletal Structures

open access: yesInternational Journal of Applied Mechanics and Engineering, 2015
The main purpose of this work is to verify the influence of the weighting procedure in the Least Squares Method on the probabilistic moments resulting from the stability analysis of steel skeletal structures.
M. Kamiński, J. Szafran
doaj   +1 more source

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