https://doi.org/10.1140/epjd/e2005-00192-7
The classical nature of signal velocity not greater than c
1
Department of Physics, Zhejiang University, Hangzhou, 310027, P.R. China
2
Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
3
Department of Physics, Nanchang University, Nanchang 330047, P.R. China
4
Department of Physics, Tongji University, Shanghai 200092, P.R. China
Corresponding author: a sxwlg@yahoo.com.cn
Received:
25
June
2004
Revised:
31
January
2005
Published online:
26
July
2005
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.
PACS: 03.65.Sq – Semiclassical theories and applications / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 42.25.Bs – Wave propagation, transmission and absorption
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
