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Springer eBooks

Faster-than-light propagations and their applications

R. Y. Chiao, Claus Ropers, Daniel R. Solli, Jandir M. Hickmann

Published Jan 1, 2003• 2 citations
Publisher
DOI
10.1007/978-1-4419-8907-9_9

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Theoretically, if electrons in the orbit of an element’s atoms were to orbit faster than light, there might be emission of Cerenkov radiation, and that element propagates into the past. As it seems practically impossible to make electrons orbit the atoms in an element faster than light, one considers tunneling. It is known that electrons that tunnel, according to Gunter Nimtz, propagate faster than light. If one can achieve continuous tunneling of electrons through a superconducting quantum interference device (SQUID), faster than light might achieve this. But the properties of tunneling electrons become virtual particles, non-local, faster than light, and invisible would be magnified in a SQUID.
Fast or slow light propagation means that the group velocity of a quasi-monochromatic light pulse propagating in a resonant medium can be significantly faster or slower than the light speed in a vacuum. Since the end of the last century and the beginning of this century, studies on this subject have attracted a great deal of interest. Remarkable progress has been achieved, based on various nonlinear optical interactions in resonant media. The fundamental research on this subject can enrich our understanding of special relativity and causality in physics. On the other hand, those mechanisms and techniques developed for fast and slow light propagation have provided the potential for many future applications, such as optical buffers and variable delay lines for optical networks, optical computing, optical telecommunications, optical data storage, and signal processing.