Physics – Classical Physics
Scientific paper
2002-10-10
Physical Review E69 (2004) 027602
Physics
Classical Physics
LaTeX file (12 pages), plus 5 figures in jpeg
Scientific paper
10.1103/PhysRevE.69.027602
It is now wellknown that Maxwell equations admit of wavelet-type solutions endowed with arbitrary group-velocities (0 < v_g < infinity). Some of them, which are rigidly moving and have been called localized solutions, attracted large attention. In particular, much work has been done with regard to the Superluminal localized solutions (SLS), the most interesting of which resulted to be the "X-shaped" ones. The SLSs have been actually produced in a number of experiments, always by suitable interference of ordinary-speed waves. In this note we show, by contrast, that even a Superluminal charge creates an electromagnetic X-shaped wave. Namely, on the basis of Maxwell equations, we are able to evaluate the field associated with a Superluminal charge (under the approximation of pointlikeness): and it results to constitute a very simple example of true X-wave. [PACS nos.: 03.50.De; 03.30.+p; 41.20;Jb; 04.30.Db. Keywords: Special relativity; Maxwell equations; Superluminal waves; X-shaped waves; Localized beams; Wave propagation; Superluminal charges].
Dartora Cesar A.
Nobrega Kleber Z.
Recami Erasmo
Zamboni-Rached Michel
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