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Open Inflation Without False Vacua

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arxiv hep-th/9802030 v1 pith:FUJY5NND submitted 1998-02-05 hep-th astro-phgr-qchep-ph

S.W. Hawking , Neil Turok This is my paper · ORCID
classification hep-thastro-phgr-qchep-ph
keywords inflationmodelsopenproposalanthropicapproxapproximationboundary
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abstract

We show that within the framework of a definite proposal for the initial conditions for the universe, the Hartle-Hawking `no boundary' proposal, open inflation is generic and does not require any special properties of the inflaton potential. In the simplest inflationary models, the semiclassical approximation to the Euclidean path integral and a minimal anthropic condition lead to $\Omega_0\approx 0.01$. This number may be increased in models with more fields or extra dimensions.

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Forward citations

Cited by 5 Pith papers

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

  1. On quantum creation of a toroidal universe

    gr-qc 2025-08 accept novelty 7.0 of 10

    Toroidal universes with vacuum energy are geodesically incomplete, and their semiclassical nucleation instantons are singular, so quantum creation from nothing cannot be described within semiclassical quantum gravity.

  2. Morse-Bott inequalities, Topology Change and Cobordisms to Nothing

    hep-th 2024-10 unverdicted novelty 6.0 of 10

    Morse-Bott inequalities yield homology bounds and topology-change counts for generic cobordisms to nothing in string theory compactifications.

  3. Inflation, Open Universes, and Dark Energy

    astro-ph.CO 2026-07 conditional novelty 5.0 of 10

    A slightly open universe with Ω_k ≈ 3×10^{-3} pulls n_s down to ~0.969, reconciling plateau inflation models with combined CMB and DESI data.

  4. Black Holes and Baryon Number Violation: Unveiling the Origins of Early Galaxies and the Low-Mass Gap

    hep-ph 2024-11 reject novelty 5.0 of 10

    The authors argue that near a black hole horizon the gravitational field flattens the Higgs potential, removing the sphaleron barrier, and that the resulting baryon generation can explain early massive galaxies and th...

  5. Relaxation of Higgs mass and cosmological constant with four-form fluxes and reheating

    hep-ph 2019-08 conditional novelty 5.0 of 10

    Four-form flux can relax the Higgs mass and cosmological constant, and a new scalar from the induced R^2 term can act as the inflaton to reheat the Universe.

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