Academic Journal
The Simplest Inflationary Potentials
| العنوان: | The Simplest Inflationary Potentials |
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| المؤلفون: | Sousa, Tomás, Bartlett, Deaglan J, Desmond, Harry, Ferreira, Pedro G |
| المساهمون: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Phys.Rev.D ; https://hal.science/hal-04273752 ; Phys.Rev.D, 2024, 109 (8), pp.083524. ⟨10.1103/PhysRevD.109.083524⟩ |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | inflation, slow-roll approximation, gravitational radiation, primordial, inflaton, potential, model, field theory, scalar, Planck, cosmic background radiation, efficiency, simplex, quality, structure, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], [INFO]Computer Science [cs], [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th] |
| الوصف: | International audience ; Inflation is a highly favoured theory for the early Universe. It is compatible with current observations of the cosmic microwave background and large scale structure and is a driver in the quest to detect primordial gravitational waves. It is also, given the current quality of the data, highly under-determined with a large number of candidate implementations. We use a new method in symbolic regression to generate all possible simple scalar field potentials for one of two possible basis sets of operators. Treating these as single-field, slow-roll inflationary models we then score them with an information-theoretic metric ("minimum description length") that quantifies their efficiency in compressing the information in the Planck data. We explore two possible priors on the parameter space of potentials, one related to the functions' structural complexity and one that uses a Katz back-off language model to prefer functions that may be theoretically motivated. This enables us to identify the inflaton potentials that optimally balance simplicity with accuracy at explaining the Planck data, which may subsequently find theoretical motivation. Our exploratory study opens the door to extraction of fundamental physics directly from data, and may be augmented with more refined theoretical priors in the quest for a complete understanding of the early Universe. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/2310.16786; hal-04273752; https://hal.science/hal-04273752; ARXIV: 2310.16786; INSPIRE: 2713994 |
| DOI: | 10.1103/PhysRevD.109.083524 |
| الاتاحة: | https://hal.science/hal-04273752 https://doi.org/10.1103/PhysRevD.109.083524 |
| رقم الانضمام: | edsbas.6913B4B2 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevD.109.083524 |
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