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university of Provence - Aix-Marseille I |  |
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university of Provence - Aix-Marseille I | |
| HAL: hal-00549668, version 1 |
| arXiv: 1011.4705 |
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| Spinfoam Cosmology: quantum cosmology from the full theory |
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| Francesca Vidotto 1, 2 |
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| (2010-11-21) |
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| Quantum cosmology is usually studied quantizing symmetry-reduced variables. Is it possible, instead, to define quantum cosmology starting from the full quantum gravity theory? In Loop Quantum Gravity (LQG), it is possible to cut the degrees of freedom in a suitable way, in order to define a cosmological model. Such a model provides a tool for describing general fluctuations of the quantum geometry at the bounce that replaces the initial singularity. I focus on its simplest version, a "dipole" formed by two tetrahedra. This has been shown to describe a universe with anisotropic and inhomogenous degrees of freedom. Its dynamics can be given using the spinfoam formalism. I briefly review the present state of this approach. |
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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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| 2: | Dipartimento di Fisica |
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Università di Pavia |
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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/1011.4705 |
| hal-00549668, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00549668 | |
| oai:hal.archives-ouvertes.fr:hal-00549668 | |
| From: Francesca Vidotto | |
| Submitted on: Wednesday, 22 December 2010 12:02:19 | |
| Updated on: Wednesday, 22 December 2010 12:02:19 | |
