Big Bang as a Critical Point
This article addresses the issue of possible gravitational phase transitions in the early universe. We suggest that a second-order phase transition observed in the Causal Dynamical Triangulations approach to quantum gravity may have a cosmological relevance. The phase transition interpolates between...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2017/4015145 |
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| _version_ | 1832564170005938176 |
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| author | Jakub Mielczarek |
| author_facet | Jakub Mielczarek |
| author_sort | Jakub Mielczarek |
| collection | DOAJ |
| description | This article addresses the issue of possible gravitational phase transitions in the early universe. We suggest that a second-order phase transition observed in the Causal Dynamical Triangulations approach to quantum gravity may have a cosmological relevance. The phase transition interpolates between a nongeometric crumpled phase of gravity and an extended phase with classical properties. Transition of this kind has been postulated earlier in the context of geometrogenesis in the Quantum Graphity approach to quantum gravity. We show that critical behavior may also be associated with a signature change in Loop Quantum Cosmology, which occurs as a result of quantum deformation of the hypersurface deformation algebra. In the considered cases, classical space-time originates at the critical point associated with a second-order phase transition. Relation between the gravitational phase transitions and the corresponding change of symmetry is underlined. |
| format | Article |
| id | doaj-art-0f1aea7c2c214acb8cbc77e64546e89e |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-0f1aea7c2c214acb8cbc77e64546e89e2025-02-03T01:11:36ZengWileyAdvances in High Energy Physics1687-73571687-73652017-01-01201710.1155/2017/40151454015145Big Bang as a Critical PointJakub Mielczarek0Institute of Physics, Jagiellonian University, Ul. Łojasiewicza 11, 30-348 Kraków, PolandThis article addresses the issue of possible gravitational phase transitions in the early universe. We suggest that a second-order phase transition observed in the Causal Dynamical Triangulations approach to quantum gravity may have a cosmological relevance. The phase transition interpolates between a nongeometric crumpled phase of gravity and an extended phase with classical properties. Transition of this kind has been postulated earlier in the context of geometrogenesis in the Quantum Graphity approach to quantum gravity. We show that critical behavior may also be associated with a signature change in Loop Quantum Cosmology, which occurs as a result of quantum deformation of the hypersurface deformation algebra. In the considered cases, classical space-time originates at the critical point associated with a second-order phase transition. Relation between the gravitational phase transitions and the corresponding change of symmetry is underlined.http://dx.doi.org/10.1155/2017/4015145 |
| spellingShingle | Jakub Mielczarek Big Bang as a Critical Point Advances in High Energy Physics |
| title | Big Bang as a Critical Point |
| title_full | Big Bang as a Critical Point |
| title_fullStr | Big Bang as a Critical Point |
| title_full_unstemmed | Big Bang as a Critical Point |
| title_short | Big Bang as a Critical Point |
| title_sort | big bang as a critical point |
| url | http://dx.doi.org/10.1155/2017/4015145 |
| work_keys_str_mv | AT jakubmielczarek bigbangasacriticalpoint |