2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Geometric Inflation

4 Jun 2019, 14:30
15m
SCB 9242 (Simon Fraser University)

SCB 9242

Simon Fraser University

Oral (Non-Student) / Orale (non-étudiant(e)) Theoretical Physics / Physique théorique (DTP-DPT) T3-9 Cosmology (DTP) | Cosmologie (DPT)

Speaker

Dr Robie Hennigar

Description

We argue that the presence of an inflationary epoch is a natural, almost unavoidable, consequence of the existence of a sensible effective action involving an infinite tower of higher-curvature corrections to the Einstein-Hilbert action. No additional fields besides the metric are required. We show that a family of such corrections giving rise to a well-posed cosmological evolution exists and automatically replaces the radiation-dominated early-universe Big Bang by a singularity-free period of exponential growth of the scale factor, which is gracefully connected with standard late-time ΛCDM cosmology. The class of higher-curvature theories giving rise to sensible cosmological evolution share additional remarkable properties such as the existence of Schwarzschild-like non-hairy black holes, or the fact that, just like for Einstein gravity, the only degrees of freedom propagated on the vacuum are those of the standard graviton.

Primary author

Dr Robie Hennigar

Co-authors

Dr Pablo Bueno Mr Pablo Cano Dr Jose Edelstein Dr Luisa Jaime Dr Gustavo Arciniega

Presentation Materials

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