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Issue title: Proceedings of the San Marino Workshop on Astrophysics and Cosmology for Matter and Antimatter, Italy, September 5–9, 2011
Guest editors: Christian Corda
Article type: Research Article
Authors: Nimtz, Günter
Affiliations: II. Physikalisches Institut, Universität zu Köln, Köln, Germany. E-mail: G.Nimtz@uni-koeln.de
Abstract: Superluminal signal velocity is widely assumed to confront Einstein causality and thus the Special Theory of Relativity (STR). Actually, there is only the tunneling mechanism known to permit superluminal signal velocities at present. The demonstrated negative group velocity experiments don't represent superluminal signal velocities. In those experiments only the signal's peak traveled faster than light and the signal was reshaped. In this Note we shall discuss why tunneling allows superluminal signal velocities. However, opposed to text books on STR we have shown that a superluminal signal beam does not allow the design of a time machine.
Keywords: Tunneling, virtual particles, superluminal
DOI: 10.3233/JCM-120459
Journal: Journal of Computational Methods in Sciences and Engineering, vol. 13, no. 1-2, pp. 171-176, 2013
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