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arxiv 1610.03400 v3 pith:YZC5AL3P submitted 2016-10-11 gr-qc astro-ph.COhep-th

The Effective Field Theory of nonsingular cosmology

Yong Cai , Youping Wan , Hai-Guang Li , Taotao Qiu , Yun-Song Piao This is my paper
classification gr-qc astro-ph.COhep-th
keywords nonsingularcosmologicalno-gocosmologyeffectivefieldtheoremtheory
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper, we explore the nonsingular cosmology within the framework of the Effective Field Theory(EFT) of cosmological perturbations. Due to the recently proved no-go theorem, any nonsingular cosmological models based on the cubic Galileon suffer from pathologies. We show how the EFT could help us clarify the origin of the no-go theorem, and offer us solutions to break the no-go. Particularly, we point out that the gradient instability can be removed by using some spatial derivative operators in EFT. Based on the EFT description, we obtain a realistic healthy nonsingular cosmological model, and show the perturbation spectrum can be consistent with the observations.

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Cited by 6 Pith papers

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

  1. Phase-resolved field-space distance criteria in ekpyrotic, bouncing and cyclic cosmologies

    gr-qc 2026-05 unverdicted novelty 7.0

    Phase-resolved field-space distance bounds for non-inflationary smoothing yield a master lower bound on ε_ek and imply ultra-fast-roll ekpyrosis or modified bounces to match observed red-tilted perturbations.

  2. Phase-resolved field-space distance criteria in ekpyrotic, bouncing and cyclic cosmologies

    gr-qc 2026-05 unverdicted novelty 7.0

    Phase-resolved scalar distance bounds are derived for ekpyrotic, bouncing, and cyclic cosmologies, yielding a master condition that lower-bounds ε_ek from remaining distance after conversion and bounce.

  3. Phase-resolved field-space distance criteria in ekpyrotic, bouncing and cyclic cosmologies

    gr-qc 2026-05 unverdicted novelty 6.0

    Proposes phase-resolved invariant path-length criteria and a master formula for lower bound on ε_ek in ekpyrotic cosmologies, using BKL suppression and conversion windows as constraints.

  4. Geodesically Complete Curvature-Bounce Inflation

    astro-ph.CO 2026-04 unverdicted novelty 6.0

    Constructs an explicit closed FRW curvature-supported bounce-inflation model with a canonical scalar field that remains geodesically complete, NEC-compliant, and yields standard slow-roll predictions.

  5. Does Eternal Inflation Violate the Smeared Null Energy Condition?

    gr-qc 2026-06 unverdicted novelty 5.0

    In canonical single-field eternal inflation, stochastic upward fluctuations do not violate the SNEC within the semiclassical slow-roll regime due to parametrically bounded drift and a strong timescale hierarchy N_SNEC ≫ N_BR.

  6. Geodesically Complete Curvature-Bounce Inflation

    astro-ph.CO 2026-04 unverdicted novelty 5.0

    A closed k=+1 FRW universe with curvature-driven bounce and canonical scalar inflation remains sub-Planckian, satisfies the null energy condition, and produces ns=0.9617-0.9650 and r=0.0037-0.0045 consistent with data.