Non-Singular Bounces Catalysed by Dark Energy

Abstract

We investigate classically non-singular bounces caused by dark energy. In the presence of positive spatial curvature, vacuum energy, either in the form of a cosmological constant or a scalar field potential, allows for an open set of initial conditions leading to non-singular bounces, without any violation of the null energy condition. We study anisotropic Bianchi IX cosmologies, and demonstrate that they can even have multiple bounces, accompanied by intricate evolutions of the anisotropies that provide a non-singular analogue of mixmaster crunches. The relation of these solutions to more complete cosmological models, as well as to the recently proposed swampland criteria, are briefly discussed.

30 pages, 25 figure files; v2: references added

References in corpus (7)

• No Rescue for the No Boundary Proposal
• Cosmological Perturbations Through a Non-Singular Ghost-Condensate/Galileon Bounce
• G-Bounce Inflation: Towards Nonsingular Inflation Cosmology with Galileon Field
• Dark Energy and the Return of the Phoenix Universe
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Cited by in corpus (2)

• The Cosmological OTOC: Formulating new cosmological micro-canonical correlation functions for random chaotic fluctuations in Out-of-Equilibrium Quantum Statistical Field Theory
• A generalized Kasner transition for bouncing Bianchi I models in modified gravity theories