Note on initial conditions for small-field inflation
| Autor: | Spyros Sypsas, Ignatios Antoniadis, Auttakit Chatrabhuti, Hiroshi Isono |
|---|---|
| Přispěvatelé: | Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Inflation
High Energy Physics - Theory velocity 530 Physics media_common.quotation_subject FOS: Physical sciences Context (language use) Scalar potential General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics Plateau (mathematics) 01 natural sciences General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Attractor Overshoot (signal) inflation 010306 general physics Quantum media_common Physics [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th] 010308 nuclear & particles physics quantum mechanics potential: scalar phase space: trajectory slow-roll approximation Mechanics Inflaton inflaton boundary condition Cosmology attractor High Energy Physics - Phenomenology High Energy Physics - Theory (hep-th) [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] |
| Zdroj: | Physical Review Antoniadis, Ignatios; Chatrabhuti, Auttakit; Isono, Hiroshi; Sypsas, Spyros (2020). Note on initial conditions for small-field inflation. Physical review. D-particles, fields, gravitation, and cosmology, 102(10), p. 103510. American Physical Society 10.1103/PhysRevD.102.103510 Phys.Rev.D Phys.Rev.D, 2020, 102 (10), pp.103510. ⟨10.1103/PhysRevD.102.103510⟩ |
| DOI: | 10.7892/boris.148246 |
| Popis: | We show that initial conditions for small-field inflation can be determined quantum mechanically by introducing a suitable flattened region in the scalar potential. The inflaton is then driven towards the slow-roll attractor solution exponentially fast, desensitising inflation from the initial velocity and partially evading the so-called overshoot problem. We give an explicit example in the context of hilltop inflation by introducing an ultra slow-roll plateau around the maximum of the potential and analyse its effect on the phase-space trajectories. 20 pages, 5 figures, v2: comments and references added, typos corrected, published version |
| Databáze: | OpenAIRE |
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