dorsal/arxiv
View SchemaOne more experiment on "fast-light"
| Authors | R Assumpcao |
|---|---|
| Categories | |
| ArXiv ID | physics/0312068 |
| URL | https://arxiv.org/abs/physics/0312068 |
Abstract
Contemporary observational and theoretical studies on the temporal nature of microscopic measurements renewed the discussion about the fundamental constants, leading to the possibility of light speed variation and superluminal pulse propagation. Gain assisted experiments using anomalous dispersion near an absorption line in atomic gas, a "fast - light" medium, seem to lead to a wave group velocity vG exceeding c, the vacuum speed of light; moreover, definition of the information velocity vi sets the question of interpretation of the three speeds: one view is that vi = vG, but this violates Causality; another view is that vi = c in all situations, but this limits, a priori, the transport of information. Another view is that vi, vG and c are distinct. This contribution follows the last possibility. A draft discussion on space-time is given.
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"abstract": "Contemporary observational and theoretical studies on the temporal nature of\nmicroscopic measurements renewed the discussion about the fundamental\nconstants, leading to the possibility of light speed variation and superluminal\npulse propagation. Gain assisted experiments using anomalous dispersion near an\nabsorption line in atomic gas, a \"fast - light\" medium, seem to lead to a wave\ngroup velocity vG exceeding c, the vacuum speed of light; moreover, definition\nof the information velocity vi sets the question of interpretation of the three\nspeeds: one view is that vi = vG, but this violates Causality; another view is\nthat vi = c in all situations, but this limits, a priori, the transport of\ninformation. Another view is that vi, vG and c are distinct. This contribution\nfollows the last possibility. A draft discussion on space-time is given.",
"arxiv_id": "physics/0312068",
"authors": [
"R Assumpcao"
],
"categories": [
"physics.gen-ph"
],
"title": "One more experiment on \"fast-light\"",
"url": "https://arxiv.org/abs/physics/0312068"
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