Seeding of Primordial Perturbations During a Decelerated Expansion

Abstract

A scalar field with a modified dispersion relation may seed, under certain conditions, the primordial perturbations during a decelerated expansion. In this note we examine whether and how these perturbations can be responsible for the structure formation of observable universe. We discuss relevant difficulties and possible solutions.

5 pages, 3 figures, more details and clarifications added, refs. added, new version with 6 pages has been splitted into various sections, to be published in PRD, v3, matched to published version

References in corpus (2)

• Near Scale Invariance with Modified Dispersion Relations
• On Primordial Perturbations of Test Scalar Fields

Cited by in corpus (10)

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• Scale Invariance via a Phase of Slow Expansion
• On Primordial Density Perturbation and Decaying Speed of Sound
• Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
• Primordial Perturbations During a Slow Expansion
• Adiabatic Duality: Duality of cosmological models with varying slow-roll parameter and sound speed