Propagation of Fronts and Information in Dispersive Media

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We present a general proof based on Kramers-Kronig relations that, in a normal or anomalous dispersive linear medium, any (discontinuitynonanalytic disturbance) in an electromagnetic pulse can not propagate faster than the phase velocity, $c$. Consequently the information carried by the discontinuity (nonanalytical disturbance) can not be transmitted superluminally.
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Classical Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/85629

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/physics/0310026
 http://arxiv.org/abs/physics/0310026

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arXiv