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Non-Gaussianity in a Matter Bounce

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arxiv 0903.0631 v2 pith:OVK5AFYW submitted 2009-03-03 astro-ph.CO gr-qchep-phhep-th

Yi-Fu Cai , Wei Xue , Robert Brandenberger , Xinmin Zhang This is my paper · ORCID
classification astro-ph.COgr-qchep-phhep-th
keywords fluctuationsadiabaticallowalternativebouncebouncingcontractingcosmological
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A nonsingular bouncing cosmology in which the scales of interest today exit the Hubble radius in a matter-dominated contracting phase yields an alternative to inflation for producing a scale-invariant spectrum of adiabatic cosmological fluctuations. In this paper we identify signatures in the non-Gaussianities of the fluctuations which are specific to this scenario and allow it to be distinguished from the results of inflationary models.

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Cited by 4 Pith papers

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

  1. Primordial non-Gaussianities of scalar and tensor perturbations in general bounce cosmology: Evading the no-go theorem

    gr-qc 2019-08 conditional novelty 6.0 of 10

    In Horndeski gravity, matter bounce models can simultaneously satisfy the tensor-to-scalar ratio bound and non-Gaussianity constraints, evading a no-go theorem that applies to k-essence bounce models.

  2. MUltiplexed Survey Telescope (MUST) Science White Paper I: Overview of Large-Scale Structure Cosmology in the Era of Stage-V Spectroscopic Surveys

    astro-ph.CO 2024-11 unverdicted novelty 4.0 of 10

    MUST is a planned 6.5m Stage-V spectroscopic survey telescope targeting 100M+ galaxies and quasars to z~5.5 for large-scale structure cosmology studies.

  3. The Quintom theory of dark energy after DESI DR2

    astro-ph.CO 2025-05 unverdicted novelty 3.0 of 10

    This review traces the history of dynamical dark energy, presents the no-go theorem against single-field crossing of w = -1, and surveys viable Quintom constructions including multi-field models and modified gravity i...

  4. A short review on Quintom dark energy theory

    astro-ph.CO 2026-05 unverdicted novelty 2.0 of 10

    Quintom dark energy models permit the equation of state to cross w=-1, supporting bouncing cosmologies and CMB-based tests of dark energy nature.

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