A Universe from a Lagrangian Fixed Point
| Autor: | Alvarez, Pedro D., Koch, Benjamin, Riahinia, Ali, Rincon, Angel |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Physics of the Dark Universe 46 (2024) 101674 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.dark.2024.101674 |
| Popis: | In this paper, we investigate the theoretical possibility that a Lagrangian fixed point, when applied to cosmological models, can drive dynamical evolution towards a bouncing universe. We analyze the physics of a Lagrangian fixed point within the context of a gravitational average effective action featuring scale-dependent couplings. To explore this concept, we develop a toy model set in a four-dimensional, spatially flat spacetime, anchored by a Lagrangian fixed point. Solving the cosmological equations of this model analytically, we identify several non-trivial solution branches. These branches are characterized by a modified scale factor and dynamic gravitational couplings, offering new insights into the behavior of cosmological models under these conditions. Comment: 20 pages, 7 figures |
| Databáze: | arXiv |
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