Nonlinear interaction of photons and phonons in electronpositron plasmas
Abstract
Nonlinear interaction of electromagnetic waves and acoustic modes in an electronpositron plasma is investigated. The plasma of electrons and positrons is quite plastic so that the imposition of electromagnetic (EM) waves causes depression of the plasma and other structural imprints on it through either the nonresonant or resonant interaction. The theory shows that the nonresonant interaction can lead to the coalescence of photons and collapse of plasma cavity in higher (greater than or = to 2) dimensions. The resonant interaction, in which the group velocity of EM waves is equal to the phase velocity of acoustic waves, is analyzed and a set of basic equations of the system is derived via the reductive perturbation theory. New solutions of solitary types were found: bright solitons, kink solitons, and dark solitons as the solutions to these equations. The computation hints their stability. An impact of the present theory on astrophysical plasma settings is expected, including the cosmological relativistically hot electronpositron plasma.
 Publication:

Unknown
 Pub Date:
 March 1990
 Bibcode:
 1990nipp.rept.....T
 Keywords:

 ElectronPositron Plasmas;
 FokkerPlanck Equation;
 Nonlinearity;
 Pair Production;
 Phonons;
 Photons;
 Shock Wave Propagation;
 Solitary Waves;
 Annihilation Reactions;
 Electromagnetic Wave Transmission;
 Maxwell Equation;
 Plasma Waves;
 Schroedinger Equation;
 Plasma Physics