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| HAL : hal-00730837, version 1 |
| arXiv : 1105.4539 |
| Code Bibliographique ADS : 2011PhRvL.107s1103S |
| DOI : 10.1103/PHYSREVLETT.107.191103 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review Letters 107 (2011) 191103 |
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| Effective Potential for Quantum Scalar Fields in a de Sitter Geometry |
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| J. Serreau1 |
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| (11/2011) |
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| We study the quantum theory of an O(N) scalar field on de Sitter geometry at leading order in a nonperturbative 1/N expansion. This resums the infinite series of so-called superdaisy loop diagrams. We obtain the de Sitter symmetric solutions of the corresponding, properly renormalized, dynamical field equations and compute the complete effective potential. Because of its self-interactions, the field acquires a strictly positive square mass which screens potential infrared divergences. Moreover, strongly enhanced ultralong-wavelength fluctuations prevent the existence of a spontaneously broken symmetry state in any dimension. |
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| 1 : | APC - AstroParticule et Cosmologie |
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| APC - THEORIE |
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| Domaine | : | Physique/Physique des Hautes Energies - Théorie Physique/Relativité Générale et Cosmologie Quantique Physique/Physique des Hautes Energies - Phénoménologie Physique/Physique Nucléaire Théorique |
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| Quantum field theory in curved spacetime – Cosmology |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/1105.4539 |
| hal-00730837, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00730837 | |
| oai:hal.archives-ouvertes.fr:hal-00730837 | |
| Contributeur : Julien Serreau | |
| Soumis le : Mardi 11 Septembre 2012, 11:49:49 | |
| Dernière modification le : Mardi 11 Septembre 2012, 14:27:15 | |
