A new kind of cyclic universe

Abstract

Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale factor grows by an exponential factor from one cycle to the next. The resulting cosmology not only resolves the homogeneity, isotropy, flatness and monopole problems and generates a nearly scale invariant spectrum of density perturbations, but it also addresses a number of age-old cosmological issues that big bang inflationary cosmology does not. There may also be wider-ranging implications for fundamental physics, black holes and quantum measurement.

7 pages, 3 figures

References in corpus (5)

• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• New Ekpyrotic Cosmology
• Generating Ekpyrotic Curvature Perturbations Before the Big Bang
• The Measure Problem in Cosmology
• Evolution to a smooth universe in an ekpyrotic contracting phase with w > 1

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• Decoherence out of fire: Purity loss in expanding and contracting universes
• Optimal parameterizations for observational constraints on thawing dark energy
• Quantum Circuit Complexity of Primordial Perturbations
• The de Broglie-Bohm Quantum Theory and its Application to Quantum Cosmology
• On the initial singularity in Kantowski-Sachs spacetime
• Bouncing cosmology from nonlinear dark energy with two cosmological constants
• Numerical Relativity as a New Tool for Fundamental Cosmology
• f(R,T) Gravity Model Behaving as a Dark Energy Source
• Big Bounce or Double Bang? A Reply to Craig and Sinclair on the Interpretation of Bounce Cosmologies
• A Higher Dimensional Cosmological Model for the Search of Dark Energy Source
• Cosmological solutions with time-delay
• Unifying turnaround-bounce cosmology in a cyclic universe considering a running vacuum model
• Kinetically-driven ekpyrosis
• Bouncing completion of eternal inflation