| Domaine : |
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| Titre : |
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Infrared behavior and gauge artifacts in de Sitter spacetime. I. The photon field |
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| Auteur(s) : |
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A. Youssef ( )1 |
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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 infrared (long distance) behavior of the free photon field in de Sitter spacetime. Using a two-parameter family of gauge fixing terms, we show that the infrared (IR) behavior of the two-point function is highly gauge-dependent and ranges from vanishing to growing. This situation is in disagreement with its counterpart in flat spacetime, where the two-point function vanishes in the IR for any choice of the gauge fixing parameters. A criterion to isolate the "physical'' part of the two-point function is given and is shown to lead to a well-behaved two-point function in the IR. |
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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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10/11/2010 |
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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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2011 |
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| Volume : |
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107 |
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| Numéro : |
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2 |
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| Page, identifiant, ... : |
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021101 |
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| Mots Clés : |
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Quantum field theory in curved spacetime – de Sitter – Infrared effects |
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| Classification : |
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04.62.+v |
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