Has superluminal light propagation been observed?

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dc.creatorZhang, Yuan-Zhong
dc.date2000-09-10
dc.date.accessioned2026-07-07T05:44:48Z
dc.date.available2026-07-07T05:44:48Z
dc.descriptionIt says in the report$^1$ by Wang et al. that a negative group velocity $u=-c/310$ is obtained and that a pulse advancement shift 62-ns is measured. The authors claim that the negative group velocity is associated with superluminal light propagation and that the pulse advancement is not at odds with causality or special relativity. However, it is shown here that their conclusions above are not true. Furthermore, I give some suggestion concerning a re-definition of group-velocity and a new explanation in special relativity of causality.
dc.description4 pages, LaTeX
dc.identifierhttps://arxiv.org/abs/physics/0009034
dc.identifierhttp://arxiv.org/abs/physics/0009034
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/83782
dc.subjectGeneral Physics
dc.subjectClassical Physics
dc.titleHas superluminal light propagation been observed?
dc.typetext

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