Bouncing Cosmologies

Abstract

We review the general features of nonsingular universes ({\em i.e.} those that go from an era of accelerated collapse to an expanding era without displaying a singularity) as well as cyclic universes. We discuss the mechanisms behind the bounce, and analyze examples of solutions that implement these mechanisms. Observational consequences of such regular cosmologies are also considered, with emphasis in the behavior of the perturbations.

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References in corpus (1)

• Non-local Matching Condition and Scale-invariant Spectrum in Bouncing Cosmology

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• Loop Quantum Cosmology Scalar Field Models
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• On the horizons in a viable vector-tensor theory of gravitation
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• Warm and Cold Dark Matter in Bouncing Universe
• Bouncing cosmologies in geometries with positively curved spatial sections
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• The eternal recurrence today
• Transitioning from a bounce to $R^2$ inflation
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• Bouncing solutions from generalized EoS
• Bouncing and Cyclic Quantum Primordial Universes and the Ordering Problem
• Modified St$\ddot{u}$ckelberg Formalism: Free Massive Abelian 2-Form Theory in 4D
• A Momentous Arrow of Time
• Isotropization in Chaplygin matter universes connected by a wormhole
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• Tunneling dynamics in cosmological bounce models
• Nonlinear Perturbations in a Variable Speed of Light Cosmology
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• Quantum gravity in the very early universe
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• Bouncing and collapsing universes dual to late-time cosmological models
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• Infinities as natural places
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• Repulsive gravity induced by a conformally coupled scalar field implies a bouncing radiation-dominated universe
• Adiabatic Duality: Duality of cosmological models with varying slow-roll parameter and sound speed
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• The cosmological origins of nonlinear Electrodynamics
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• Bouncing Universe with exotic radiation
• Following the density perturbations through a bounce with AdS/CFT Correspondence
• Semi-realistic Bouncing Domain Wall Cosmology
• Gravitational Leptogenesis in Bounce Cosmology
• Non-singular Universes a la Palatini
• Dynamics of General Barotropic Stellar Fluid in the Framework of $R+2\alpha T$ Gravity
• Entropies of the various components of the universe
• Early universe cosmological solutions in exponential gravity
• Cosmology from Strong Interactions
• RRR fluctuations from non-singular bounce
• St$\ddot{u}$ckelberg-Modified Massive Abelian 3-Form Theory: Constraint Analysis, Conserved Charges and BRST Algebra
• Unrivaled Quantum Vacuum in the Primordial Universe
• A philosophical argument against time machines
• Kalb-Ramond field induced cosmological bounce in generalized teleparallel gravity
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• Modeling the quantum evolution of the universe through classical matter
• Bounce and stability in the early cosmology with anomaly-induced corrections
• Quantum Creation of a Toy Universe without Inflation
• Geometrical effective actions for a partially massless spin-2 field