Exact Nonlinear Plasma Oscillations

Phase Mixing of Nonlinear Plasma Oscillations in an Arbitrary Mass Ratio Cold Plasma

Nonlinear plasma oscillations in an arbitrary mass ratio cold plasma have been studied using 1-D particle-in-cell simulation. In contrast to earlier work for infinitely massive ion plasmas it has been found that the oscillations phase mix away at any amplitude and that the rate at which phase mixing occurs, depends on the mass ratio ( ∆ = m−/m+ ) and the amplitude. A perturbation theoretic calc...

Cosmology of Nonlinear Oscillations

The nonlinear oscillations of a scalar field are shown to have cosmological equations of state with w = p/ρ ranging from −1 < w < 1. We investigate the possibility that the dark energy is due to such oscillations. ∗[email protected]

Exact solutions of nonlinear interval Volterra integral equations

On neutral plasma oscillations

We examine the conditions for the existence of spectrally stable neutral modes in a Vlasov-Poisson plasma and show that for stable equilibria of systems that have unbounded spatial domain, the only possible neutral modes are those with phase velocities that correspond to stationary inflection points of the equilibrium distribution function. It is seen that these neutral modes can possess positi...

Neutrino oscillations and the exact parity model

We reexamine neutrino oscillations in exact parity models. Previously it was shown in a specific model that large neutrino mixing angles result. We show here that this is a general result of neutrino mixing in exact parity models provided that the neutrino mass matrix is real. In this case, the effects of neutrino mixing in exact parity models is such that the probability of a given weak eigens...