Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Lopez, Samuel"'
Publikováno v:
Eur. Phys. J. C 83 (2023) 1152
We consider cosmology with an inflaton scalar field with an additional quartic kinetic term. Such a theory can be motivated by Palatini $R+R^2$ modified gravity. Assuming a runaway inflaton potential, we take the Universe to become dominated by the k
Externí odkaz:
http://arxiv.org/abs/2305.01399
A compelling unified model of dark energy and early dark energy (EDE) is presented, using a scalar field with an exponential runaway potential, in the context of alpha-attractors. The field is originally trapped at an enhanced symmetry point, subsequ
Externí odkaz:
http://arxiv.org/abs/2303.15523
Early dark energy (EDE) is one of the most promising possibilities in order to resolve the Hubble tension: the discrepancy between early and late-Universe measurements of the Hubble constant. In this paper we propose a model of a scalar field which c
Externí odkaz:
http://arxiv.org/abs/2301.03572
We construct a model of quintessential inflation in Palatini $R^2$ gravity employing a scalar field with a simple exponential potential and coupled to gravity with a running non-minimal coupling. At early times, the field acts as the inflaton, while
Externí odkaz:
http://arxiv.org/abs/2206.14117
Autor:
Lopez, Samuel F., Janssen, Sarah E., Tate, Michael T., Fernandez, Diego P., Anderson, Christopher R., Armstrong, Grace J., Wang, Thomas C., Johnson, William P.
Publikováno v:
In Science of the Total Environment 20 December 2024 957
Publikováno v:
Galaxies 2022, 10, 57
We study a model of quintessential inflation constructed in $R^2$ modified gravity with a non-minimally coupled scalar field, in the Palatini formalism. Our non-minimal inflaton field is characterised by a simple exponential potential. We find that s
Externí odkaz:
http://arxiv.org/abs/2203.05424
Publikováno v:
In Astroparticle Physics May 2024 157
Publikováno v:
Phys. Rev. D 103, 043533 (2021)
We investigate in detail a family of quintessential inflation models in the context of $R+R^2$ Palatini modified gravity. We find that successful inflation and quintessence are obtained with an inflaton scalar potential that is approximately quadrati
Externí odkaz:
http://arxiv.org/abs/2012.06831
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