Physics – Classical Physics
Scientific paper
1997-04-20
Phys.Rev. E55 (1997) 3647
Physics
Classical Physics
17 pages, 4 figures, RevTeX
Scientific paper
10.1103/PhysRevE.55.3647
We apply expansion methods to obtain an approximate expression in terms of elementary functions for the space and time dependence of wave packets in a dispersive medium. The specific application to pulses in a cold plasma is considered in detail, and the explicit analytic formula that results is provided. When certain general initial conditions are satisfied, these expressions describe the packet evolution quite well. We conclude by employing the method to exhibit aspects of dispersive pulse propagation in a cold plasma, and suggest how predicted and experimental effects may be compared to improve the theoretical description of a medium's dispersive properties.
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