Nonsingular bouncing cosmologies in light of BICEP2

Abstract

We confront various nonsingular bouncing cosmologies with the recently released BICEP2 data and investigate the observational constraints on their parameter space. In particular, within the context of the effective field approach, we analyze the constraints on the matter bounce curvaton scenario with a light scalar field, and the new matter bounce cosmology model in which the universe successively experiences a period of matter contraction and an ekpyrotic phase. Additionally, we consider three nonsingular bouncing cosmologies obtained in the framework of modified gravity theories, namely the Hořava-Lifshitz bounce model, the $f(T)$ bounce model, and loop quantum cosmology.

8 pages, 3 figures, references added. Replaced to match published version

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Cited by in corpus (10)

• A Critical Review of Classical Bouncing Cosmologies
• Matter creation in a nonsingular bouncing cosmology
• A $\Lambda$CDM bounce scenario
• Bounce universe from string-inspired Gauss-Bonnet gravity
• Matter bounce cosmology with a generalized single field: non-Gaussianity and an extended no-go theorem
• Bounce cosmology in $f(\mathcal{R})$ gravity
• Non-singular Bounce Cosmology from Lagrange Multiplier $F(R)$ Gravity
• The Cosmological OTOC: Formulating new cosmological micro-canonical correlation functions for random chaotic fluctuations in Out-of-Equilibrium Quantum Statistical Field Theory
• Massive gravity and the suppression of anisotropies and gravitational waves in a matter-dominated contracting universe
• Viable non-singular cosmic bounce in holonomy improved F(R) gravity endowed with a Lagrange multiplier