Abstract
The approximate propagation of Gaussian pulses in a Langmuir plasma described by Zakharov equations is considered. By using the Rayleigh-Ritz optimization method based on trial functions, a set of ordinary differential equations for the pulse parameters has been derived. In the static limit, previous results are regained. In the nonstatic description, the periodic time of oscillation for the width of the pulse is reduced from that in the static limit.
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