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| HAL : hal-00534911, version 1 |
| Code Bibliographique ADS : 2011PhRvL.107b1101Y |
| DOI : 10.1103/PhysRevLett.107.021101 |
| Fiche détaillée |  Récupérer au format |
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| Physical Review Letters 107, 2 (2011) 021101 |
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| Infrared behavior and gauge artifacts in de Sitter spacetime. I. The photon field |
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| A. Youssef1 |
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| (2011) |
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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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| 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 |
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| Quantum field theory in curved spacetime – de Sitter – Infrared effects |
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| hal-00534911, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00534911 | |
| oai:hal.archives-ouvertes.fr:hal-00534911 | |
| Contributeur : Ahmed Youssef | |
| Soumis le : Mercredi 10 Novembre 2010, 23:04:12 | |
| Dernière modification le : Jeudi 28 Juin 2012, 17:22:51 | |
