Cosmic Acceleration from Quantum Gravity: Emergent Inflation and Dynamical Dark Energy
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914198247702528 |
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| author | Marchetti, Luca Ladstätter, Tom R. Oriti, Daniele |
| author_facet | Marchetti, Luca Ladstätter, Tom R. Oriti, Daniele |
| contents | We present a mechanism for the emergence of cosmic acceleration within the mean-field approximation of Group Field Theory models of quantum gravity. Depending on the interaction type, the resulting cosmological dynamics can either feature a late-time attractor corresponding to a dynamical dark energy phase, often with characteristic phantom behavior, including in models inspired by simplicial gravity, or instead support an early slow-roll inflationary epoch driven by the same underlying quantum-gravitational effects. This emergent inflation, effectively captured by a single-field description, can sustain the required expansion, naturally avoids the graceful exit problem, and appears to transition into a persistent, non-accelerating phase consistent with classical expectations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11712 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cosmic Acceleration from Quantum Gravity: Emergent Inflation and Dynamical Dark Energy Marchetti, Luca Ladstätter, Tom R. Oriti, Daniele General Relativity and Quantum Cosmology We present a mechanism for the emergence of cosmic acceleration within the mean-field approximation of Group Field Theory models of quantum gravity. Depending on the interaction type, the resulting cosmological dynamics can either feature a late-time attractor corresponding to a dynamical dark energy phase, often with characteristic phantom behavior, including in models inspired by simplicial gravity, or instead support an early slow-roll inflationary epoch driven by the same underlying quantum-gravitational effects. This emergent inflation, effectively captured by a single-field description, can sustain the required expansion, naturally avoids the graceful exit problem, and appears to transition into a persistent, non-accelerating phase consistent with classical expectations. |
| title | Cosmic Acceleration from Quantum Gravity: Emergent Inflation and Dynamical Dark Energy |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2512.11712 |