pith. machine review for the scientific record. sign in

arxiv: gr-qc/0211082 · v4 · submitted 2002-11-25 · 🌀 gr-qc · astro-ph

Recognition: unknown

The Emergent Universe: inflationary cosmology with no singularity

George Ellis , Roy Maartens
Authors on Pith no claims yet
classification 🌀 gr-qc astro-ph
keywords universecosmologiescurvaturepositivesingularitythentheyabove
0
0 comments X
read the original abstract

Observations indicate that the universe is effectively flat, but they do not rule out a closed universe. The role of positive curvature is negligible at late times, but can be crucial in the early universe. In particular, positive curvature allows for cosmologies that originate as Einstein static universes, and then inflate and later reheat to a hot big bang era. These cosmologies have no singularity, no "beginning of time", and no horizon problem. If the initial radius is chosen to be above the Planck scale, then they also have no quantum gravity era, and are described by classical general relativity throughout their history.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

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

  1. Effective Improved-GUP Cosmology: Emergent FLRW Universe without a Bounce

    gr-qc 2026-04 unverdicted novelty 6.0

    Improved GUP deformations applied to FLRW cosmology with Ashtekar-Barbero variables produce a non-singular emergent universe coasting from constant volume without a bounce and with a universal maximum energy density.

  2. 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.

  3. Quantum-Deformed Phase-Space Geometry and Emergent Inflation in Effective Four-Dimensional Spacetime

    gr-qc 2026-04 unverdicted novelty 5.0

    Quantum deformation of projective phase-space geometry induces a conformally deformed FLRW metric whose time-dependent corrections modify inflationary background equations, slow-roll parameters, and perturbations in a...

  4. Geodesic completion of big bangs from emergent geometry

    gr-qc 2026-02 unverdicted novelty 5.0

    Phantom Chaplygin gas forces the Einstein-frame lapse to change sign smoothly while the causal-frame lapse stays positive, yielding a robust non-singular bounce even with extra matter.