The classical nature of signal velocity not greater than c

Shi Yao ZHU*, L. G. Wang, N. H. Liu, Y. P. Yang

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

3 Citations (Scopus)


A classical model is presented to investigate the signal-to-noise ratio (SNR) for pulse propagation through an anomalous dispersive medium. By comparing the SNRs of the pulse passing through the medium and through the vacuum, we show that the problem of the signal velocity not faster than c can be considered within the scope of classical theory. It is shown that, by including the classical fluctuations, the signal velocity is not larger than c.

Original languageEnglish
Pages (from-to)129-132
Number of pages4
JournalEuropean Physical Journal D
Issue number1
Publication statusPublished - Oct 2005

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics


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