Towards geometric inflation: the cubic case

Arciniega, Gustavo; Edelstein, Jose D.; Jaime, Luisa G.

doi:10.1016/j.physletb.2020.135272

Towards geometric inflation: the cubic case

Oct 18, 2018

14 pages

Published in:

Phys.Lett.B 802 (2020) 135272

e-Print:

1810.08166 [gr-qc]

DOI:

10.1016/j.physletb.2020.135272 (publication)

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Abstract: (arXiv)

We present an up to cubic curvature correction to General Relativity with the following features: (i) its vacuum spectrum solely consists of a graviton and is ghost-free, (ii) it possesses well-behaved black hole solutions which coincide with those of Einsteinian cubic gravity, (iii) its cosmology is well-posed as an initial value problem and, most importantly, (iv) it entails a geometric mechanism triggering an inflationary period in the early universe (driven by radiation) with a graceful exit to a late-time cosmology arbitrarily close to

\Lambda

CDM.

Note:

14 pages, 4 figures; v2: typos fixed; v3: slightly improved version

curvature: correction
cosmological model
gravitation: model
inflation
boundary condition
general relativity
acceleration
black hole
graviton
geometry

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