Signal velocity, causality, and quantum noise in superluminal light pulse propagation
arXiv:physics/0101068 · doi:10.1103/PhysRevLett.86.3925
Abstract
We consider pulse propagation in a linear anomalously dispersive medium where the group velocity exceeds the speed of light in vacuum (c) or even becomes negative. A signal velocity is defined operationally based on the optical signal-to-noise ratio, and is computed for cases appropriate to the recent experiment where such a negative group velocity was observed. It is found that quantum fluctuations limit the signal velocity to values less than c.
4 Journal pages, 3 figures
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Cited by in corpus (36)
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