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Gauss-Bonnet Inflation

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arxiv 1503.01579 v2 pith:GQRL7V32 submitted 2015-03-05 hep-th astro-ph.COgr-qchep-ph

Panagiota Kanti , Radouane Gannouji , Naresh Dadhich This is my paper · ORCID
classification hep-thastro-ph.COgr-qchep-ph
keywords theoryinflationphasesscalarsittersolutionsalwaysargue
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We consider an Einstein-Scalar-Gauss-Bonnet gravitational theory, and argue that at early times the Ricci scalar can be safely ignored. We then demonstrate that the pure scalar-Gauss-Bonnet theory, with a quadratic coupling function, naturally supports inflationary -- de Sitter -- solutions. During inflation, the scalar field decays exponentially and its effective potential remains always bounded. The theory contains also solutions where these de Sitter phases possess a natural exit mechanism and are replaced by linearly expanding -- Milne -- phases.

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Cited by 5 Pith papers

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

  1. Inflaton Dynamics in Higher-Derivative Scalar-Tensor Theories of Gravity

    gr-qc 2025-05 conditional novelty 6.0 of 10

    In the weakly coupled regime of a four-derivative scalar-tensor theory, large inflationary inhomogeneities decay just as in general relativity, and only finely tuned initial data can escape the effective field theory'...

  2. Einstein--Gauss--Bonnet Inflationary Cosmology in Phase-$\theta$ Formalism

    gr-qc 2026-07 conditional novelty 5.0 of 10

    Phase-θ formalism maps EGB inflation backgrounds to closed-form observables beyond slow-roll; Starobinsky+linear-GB fits ACT DR6 ns and r while predicting a DECIGO-accessible GW plateau.

  3. Autonomous Dynamical System of Einstein-Gauss-Bonnet Cosmologies

    gr-qc 2019-08 conditional novelty 4.0 of 10

    A phase space analysis of Einstein-Gauss-Bonnet cosmology finds a stable equilibrium and a heteroclinic orbit, but the equilibrium requires the Gauss-Bonnet coupling to vanish and the orbit violates the Friedmann constraint.

  4. Inflationary Phenomenology of Einstein Gauss-Bonnet Gravity Compatible with GW170817

    gr-qc 2019-08 conditional novelty 4.0 of 10

    Einstein Gauss-Bonnet inflation can have gravitational wave speed equal to light speed and can match Planck 2018 data when the scalar-GB coupling satisfies \ddotξ = H\dotξ and the potential is a tuned power law.

  5. The Scale Factor Potential Approach to Inflation

    gr-qc 2019-09 reject novelty 3.0 of 10

    The paper reparametrizes slow-roll inflation through a scale factor potential and constructs an example potential, but the chosen 60 e-fold branch is inconsistent with its own first-minimum end condition.

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