NONLINEAR-INTERACTION OF PHOTONS AND PHONONS IN ELECTRON-POSITRON PLASMAS

被引:159
作者
TAJIMA, T
TANIUTI, T
机构
[1] Institute for Fusion Studies, University of Texas at Austin, Austin
来源
PHYSICAL REVIEW A | 1990年 / 42卷 / 06期
关键词
D O I
10.1103/PhysRevA.42.3587
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Nonlinear interaction of electromagnetic waves and acoustic modes in an electron-positron 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. Our theory shows that the nonresonant interaction can lead to the coalescence of photons and collapse of plasma cavity in higher (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. We find new solutions of solitary types: bright solitons, kink solitons, and dark solitons as the solutions to these equations. An implication of the present theory on astrophysical plasma settings is suggested, including the cosmological relativistically hot electron-positron plasma. © 1990 The American Physical Society.
引用
收藏
页码:3587 / 3602
页数:16
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