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Cosmic Bounces and Cyclic Universes

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arxiv 1106.0172 v1 pith:U3H5MGFW submitted 2011-06-01 hep-th astro-ph.CO

classification hep-thastro-ph.CO
keywords modelsbouncecosmologicalcyclicekpyroticaddressbouncescontracting
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Cosmological models involving a bounce from a contracting to an expanding universe can address the standard cosmological puzzles and generate "primordial" density perturbations without the need for inflation. Some such models, in particular the ekpyrotic and cyclic models that we focus on, fit rather naturally into string theory. We discuss a number of topics related to these models: the reasoning that leads to the ekpyrotic phase, the predictions for upcoming observations, the differences between singular and non-singular models of the bounce as well as the predictive and explanatory power offered by these models.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Canonical Scalar Field Inflation with a Woods-Saxon Potential

    gr-qc 2019-08 reject novelty 3.0 of 10

    A Woods-Saxon (logistic) scalar potential is claimed to produce Planck-compatible inflation and reheating, but the supporting slow-roll equations contain sign and algebra errors.

  2. Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution

    gr-qc 2017-05 accept novelty 2.0 of 10

    Modified gravity theories supply viable mathematical frameworks for inflation, bounces, and dark energy eras that match observational data.

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