Note on initial conditions for small-field inflation

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

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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 toward the slow-roll attractor solution exponentially fast, desensitizing 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 analyze its effect on the phase-space trajectories.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Antoniadis, Ignatios

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

19 Nov 2020 16:12

Last Modified:

19 Nov 2020 16:12

Publisher DOI:

10.1103/PhysRevD.102.103510

ArXiv ID:

2008.02494

BORIS DOI:

10.7892/boris.148246

URI:

https://boris.unibe.ch/id/eprint/148246

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