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The Matter Bounce Curvaton Scenario

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arxiv 1101.0822 v2 pith:MB2V76T3 submitted 2011-01-04 hep-th astro-ph.COgr-qchep-ph

Yi-Fu Cai , Robert Brandenberger , Xinmin Zhang (Arizona State , McGill , IHEP Beijing) This is my paper · ORCID
classification hep-thastro-ph.COgr-qchep-ph
keywords fluctuationsbouncecurvaturemechanismperturbationsscalarscale-invariantspectrum
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Massless scalar fields originating in a quantum vacuum state acquire a scale-invariant spectrum of fluctuations in a matter-dominated contracting universe. We show that these isocurvature fluctuations transfer to a scale-invariant spectrum of curvature fluctuations during a non-singular bounce phase. This provides a mechanism for enhancing the primordial adiabatic fluctuations and suppressing the ratio of tensor to scalar perturbations. Moreover, this mechanism leads to new sources of non-Gaussianity of curvature perturbations.

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Cited by 3 Pith papers

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

  1. Is there ghost and tachyon free bounce in UV complete gravity theory?

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Ghost- and tachyon-free bounces in AID gravity require a negative cosmological constant; known positive-Λ solutions inevitably contain ghost radiation.

  2. Gravitational Bounce from the Quantum Exclusion Principle

    gr-qc 2025-05 reject novelty 5.0 of 10

    A closed collapsing fluid ball with a hypothetical maximum density bounces into exponential expansion, which the authors equate with inflation and dark energy, predicting a small negative curvature.

  3. 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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