4 papers
On the Damped Pinney Equation from Noether Symmetry Principles
Fernando Haas
There are several versions of the damped form of the celebrated Pinney equation, which is the natural partner of the undamped time-dependent harmonic oscillator. In this work these…
Methodological notes on the gauge invariance in the treatment of waves and oscillations in plasmas the Einstein-Vlasov-Maxwell system: Fundamental equations
Lucas Bourscheidt, Fernando Haas
The theory of gauge transformations in linearized gravitation is investigated. After a brief discussion of the fundamentals of the kinetic theory in curved spacetime, the Einstein-…
Derivation of Dirac Exchange Interaction Potential from Quantum Plasma Kinetic Theory
Fernando Haas
The Dirac exchange interaction is derived from recent quantum kinetic theory for collisionless plasmas. For this purpose, the kinetic equation is written in the semiclassical and l…
Plasmon dispersion and Landau damping in the nonlinear quantum regime
F. Haas, J. T. Mendonça, H. Terças
We study the dispersion properties of electron plasma waves, or plasmons, which can be excited in quantum plasmas in the nonlinear regime. In order to describe nonlinear electron r…