| Domaine : |
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| Titre : |
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Effective Potential for Quantum Scalar Fields in a de Sitter Geometry |
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| Auteur(s) : |
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J. Serreau1 |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - THEORIE |
| Résumé : |
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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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Langue du texte
intégral : |
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Anglais |
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Date de production,
écriture : |
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01/11/2011 |
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| Journal : |
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| Physical Review Letters (Phys. Rev. Lett.) |
| Publisher |
American Physical Society |
| ISSN |
0031-9007 (eISSN : 1079-7114) |
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| Audience : |
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internationale |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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| Date de publication : |
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11/2011 |
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| Volume : |
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107 |
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| Page, identifiant, ... : |
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191103 |
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| Mots Clés : |
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Quantum field theory in curved spacetime – Cosmology |
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| Commentaire : |
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4 pages, 1 figure. Minor changes, to appear in PRL |
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