A homage to E.C.G.Sudarshan: Superluminal objects and waves (An updated overview of the relevant experiments)

Details A homage to E.C.G.Sudarshan: Superluminal objects and waves (An updated overview of the relevant experiments) A homage to E.C.G.Sudarshan: Superluminal objects and waves (An updated overview of the relevant experiments)

2008-04-09

arxiv.org/abs/0804.1502v1

Physics

Classical Physics

Source file in latex: 30 pages, with 16 Figures

Scientific paper

This writing has been prepared on the occasion of the 75th birthday of E.C.George Sudarshan, who (besides the originator of the V-A theory for weak-forces, of quantum optics --the quantum representation of coherent light--, of dynamical maps for open quantum systems, of the Zeno effect, etc.) was a pioneer, already in the sisties, also of the theory of the so-called "tachyons". This paper wishes to be a homage to E.C.G.Sudarshan, in connection with the last-mentioned pioneering work of his. After a brief theoretical introduction (based on the standard postulates of Special Relativity, and therefore extending it --or rather non-restricting it-- without any violations: for example, without any violations of the so-called Einstein causality), the main aim of this article is an updated presentation of the status-of-the-art of the "superluminal" experiments. In particular, we devote such a review to the phenomena met in tunneling through quantum (and classical) barriers [e.g., referring to the Genelalized Hartman Effect]; and in connection with the "Localized (nondiffracting) Solutions" of the wave equantions [e.g., of Maxwell equations]: especially of the "X-shaped" ones. The interested reader is provided with an extended Bibliography.

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