Propagation Of Quantum Particles Research Articles

Propagation of Waves and Particles Through Porous Structures (I)

The processes of the propagation of quantum and classical charged particles through porous films are studied. The propagation of quantum particles is analyzed by numerically calculating the Schrodinger equation. The polarization force acting on the charge is calculated within the framework of classical electrodynamics. The possibility of pore formation in the films is analyzed in the problem of the propagation of ions with large charges through ultrathin carbon films. Mathematical modeling of the film accompanied by elucidation of the most important polarization properties is carried out to understand the process more clearly. The calculations show the possibility of film perforation because of the action of ponderomotive forces generated by the strong polarization field of the wave packet of the passing ion.

Propagation of quantum particles in Brans–Dicke spacetime: The case of gamma ray bursts

The propagation of boson particles in a gravitational field described by the Brans–Dicke (BD) theory of gravity is analyzed. We derive the wave function of the scalar particles, and the effective potential experienced by the quantum particles considering the role of the varying gravitational coupling. Besides, we calculate the probability to find the scalar particles near the region where a naked singularity is present. The extremely high energy radiated in such a situation could account for the huge emitted power observed in gamma ray bursts (GRBs).

Reflection of sound by glow discharge plasma

The propagation of sound through temperature gradient regions of a glow discharge plasma is analysed. Using a JWKB solution known for a Schröedinger's equation describing the propagation of quantum particle through a potential barrier, an algorithm for evaluation of the reflection coefficient is proposed. The analytical results are compared with those obtained by numerically solving Euler's equations using a second order finite difference approach. The sound reflection coefficients calculated for temperature distribution profiles that are typical for atmospheric glow discharge plasma demonstrate that, at zero-incidence angle, a significant part, up to 25%, of the wave energy can be reflected. These results indicate that sound attenuation by the atmospheric glow discharge plasma by more than 10 dB, as demonstrated in a recent experiment, can be explained, accounting for three-dimensional effects, by the thermal gradient sound–plasma interaction mechanisms.

Can the Klein-Gordon equation describe superluminal processes?

The possibility of a superluminal (namely, faster thanc) propagation of quantum particles is discussed in the context of the Klein-Gordon equation. It is found that physical conditions exist, univocally fixing the integration path in the inverse Fourier transform representing the wave packet. This path excludes at all superluminal components.