Modulational instability and generation of envelope solitons in four‐component space plasmas
Modulational instability and generation of envelope solitons in four‐component space plasmas
A four component space plasma system (consisting of immobile positive ions, inertial cold positrons as well as hot electrons and positrons following Cairns' nonthermal distribution function is considered. The nonlinear propagation of the positron-acoustic (PA) waves, in which the inertia (restoring force) is provided by the cold positron species (nonthermal …