Abstract
We address the question about the velocity of signals carried by Bessel beams wave packets propagating in vacuum and having well defined wavefronts in time. We find that this problem is analogous to that of propagation of usual plane wave packets within dispersive media and conclude that the signal velocity can not be superluminal.
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Submitted on 29 May 2001 (v1), last revised 21 Oct 2001 (this version, v2)
Updated
arXiv.org
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