[L'inflation et ses prédictions concernant le fond diffus]
La recherche d'une explication causale des propriétés de l'univers aux grandes échelles suggère qu'une longue période d'expansion accélérée, appelée inflation, ait précédé la nucléo-synthèse primordiale. La première conséquence de l'inflation est que toutes les structures pré-existantes sont effacées. En effet, dans les modèles d'inflation les plus simples, les fluctuations de densité primordiales (les germes des structures de grandes échelles) résultent uniquement de l'amplification de fluctuations quantiques du vide. Les propriétés du spectre ainsi obtenu sont présentées et comparées avec les fluctuations de température dans le fond diffus. La correspondance est remarquable.
The search for a causal explanation of the large scale properties of the universe supports the idea that a long period of accelerated expansion, called inflation, preceded primordial nucleosynthesis. The first consequence of inflation is that all pre-existing classical structures are washed out. In fact, in the simplest inflationary models, the primordial density fluctuations (the seeds of the large scale structures) only result from the amplification of quantum vacuum fluctuations. The properties of the spectrum so obtained are presented and compared to the CMB temperature fluctuations. The agreement is striking.
Mots-clés : Inflation, Théorie quantique des champs, Anisotropies du fond de rayonnement cosmique, Cosmologie, Univers primordial
Renaud Parentani 1
@article{CRPHYS_2003__4_8_935_0,
author = {Renaud Parentani},
title = {The inflationary paradigm: predictions for {CMB}},
journal = {Comptes Rendus. Physique},
pages = {935--943},
publisher = {Elsevier},
volume = {4},
number = {8},
year = {2003},
doi = {10.1016/S1631-0705(03)00100-2},
language = {en},
}
Renaud Parentani. The inflationary paradigm: predictions for CMB. Comptes Rendus. Physique, the cosmic microwave background, Volume 4 (2003) no. 8, pp. 935-943. doi : 10.1016/S1631-0705(03)00100-2. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(03)00100-2/
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