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FIZIKA A 8 (1999) 2 , 83-90
 
ON THE ENVELOPE SOLITONS AND MODULATIONAL INSTABILITY IN AN ELECTRON -
POSITRON PLASMA
S. BURMAN and A. ROY CHOWDHURY
High Energy Physics Division, Department of Physics, Jadavpur
University, Calcutta 700 032, India
Received 23 June 1998; revised manuscript received 15 March 1999
Accepted 4 October 1999
We have studied the formation of envelope soliton in a electron-positron plasma. The
deduced nonlinear Schrödinger equation yields information about the modulational
instability of the system for the different ranges of the plasma parameters. It is
important to note that the modulational stability depends on the positron-electron density
ratio. The theory is applicable to solitary waves in space plasmas.
PACS numbers: 52.35.-g, 52.35.Sb, 02.30.Jr
UDC 531.742
Keywords: electron-positron plasma, envelope soliton, nonlinear Schrödinger equation,
modulational stability, dependence on positron-electron density ratio, solitary waves in
space plasmas
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