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university of Provence - Aix-Marseille I |  |
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university of Provence - Aix-Marseille I | |
| HAL: hal-00350217, version 1 |
| arXiv: 0802.1201 |
| Detailed view |  Export this paper |
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| International Journal of Modern Physics A 23 (2008) 1209-1213 |
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| Tensorial Structure of the LQG graviton propagator |
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| Emanuele Alesci 1 |
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| (2008) |
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| We review the construction of the tensorial structure of the graviton propagator in the context of loop quantum gravity and spinfoam formalism. The main result of this analysis is that applying the same strategy used to compute the diagonal terms, the Barrett-Crane vertex is unable to yield the correct propagator in the long distance limit. The problem is in the intertwiner-independence of the Barrett-Crane vertex. We also review the asymptotic behavior of an alternative vertex that is able to give the correct propagator. |
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| 1: | Centre de Physique Théorique (CPT) |
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CNRS : FR2291 – Université de Provence - Aix-Marseille I – Université de la Méditerranée - Aix-Marseille II – Université Sud Toulon Var |
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| Subject | : | Physics/General Relativity and Quantum Cosmology |
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| Fulltext link: |
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| http://fr.arXiv.org/abs/0802.1201 |
| hal-00350217, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00350217 | |
| oai:hal.archives-ouvertes.fr:hal-00350217 | |
| From: Elizabeth Bernardo | |
| Submitted on: Tuesday, 6 January 2009 11:24:38 | |
| Updated on: Tuesday, 6 January 2009 11:24:38 | |
