Access
To read this story in full you will need to login or make a payment (see right).
Brief Communications Arising
Nature 429, (6 May 2004) | doi:10.1038/nature02586
Open Innovation Challenges
-
Efficient Chromosome Doubling: Plant Cell Division
The Seeker is looking for an efficient chromosome doubling method in plants and in particular, metho...
-
Fast Growth of Transformed Soybean Shoots
A method for accelerating growth of soybean shoots is desired.
- More Challenges
- Powered by:
nature jobs
Research Scientist in Lipids Adulteration
- Nestle Research Center
- Lausanne 1026 Switzerland
Director of NMR
- New York Structural Biology Center
- New York, New York
Optical media: Superluminal speed of information?
Günter Nimtz1
Abstract
Arising from: M. D. Stenner, D. J. Gauthier & M. A. Neifeld Nature 425, 695–698 (2003); Stenner et al. reply
The theory of special relativity limits signal velocity to the velocity of light in a vacuum. A faster-than-light (superluminal) signal velocity would violate causality1, 2. However, there are some experimental data and theoretical arguments that a causality violation does not necessarily happen if a signal velocity becomes superluminal3. Stenner et al.4 claim to have measured the speed of information in a fast-light optical medium by using a novel experimental set-up. The measured information (its front) travelled at a speed that did not exceed c (the velocity of light in vacuum). Their experimental result is correct but the interpretation is misleading because the information did not travel in the range of fast-light frequencies, as I explain here.
To read this story in full you will need to login or make a payment (see right).
MORE ARTICLES LIKE THIS
These links to content published by NPG are automatically generated.
RESEARCH
The speed of information in a ?fast-light? optical mediumNature Letters to Editor (16 Oct 2003)
Optical media Superluminal speed of information? (reply)Nature Brief Communication (06 May 2004)
Multi-colour organic light-emitting displays by solution processingNature Letters to Editor (20 Feb 2003)
