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Palatini R 2 quintessential inflation

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Palatini R 2 quintessential inflation. / Dimopoulos, Konstantinos; Karam, Alexandros; Sánchez López, Samuel et al.
In: J. Cosmol. Astroparticle Phys., Vol. 2022, No. 10, 076, 24.10.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Dimopoulos, K, Karam, A, Sánchez López, S & Tomberg, E 2022, 'Palatini R 2 quintessential inflation', J. Cosmol. Astroparticle Phys., vol. 2022, no. 10, 076. https://doi.org/10.1088/1475-7516/2022/10/076

APA

Dimopoulos, K., Karam, A., Sánchez López, S., & Tomberg, E. (2022). Palatini R 2 quintessential inflation. J. Cosmol. Astroparticle Phys., 2022(10), Article 076. https://doi.org/10.1088/1475-7516/2022/10/076

Vancouver

Dimopoulos K, Karam A, Sánchez López S, Tomberg E. Palatini R 2 quintessential inflation. J. Cosmol. Astroparticle Phys. 2022 Oct 24;2022(10):076. doi: 10.1088/1475-7516/2022/10/076

Author

Dimopoulos, Konstantinos ; Karam, Alexandros ; Sánchez López, Samuel et al. / Palatini R 2 quintessential inflation. In: J. Cosmol. Astroparticle Phys. 2022 ; Vol. 2022, No. 10.

Bibtex

@article{df653e514d2d434785c31b59678a6a26,
title = "Palatini R 2 quintessential inflation",
abstract = "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 later on it becomes the current dark energy. Combining the scalar sector with an ideal fluid, we study the cosmological evolution of the model from inflation all the way to dark energy domination. We interpret the results in the Einstein frame, where a coupling emerges between the fluid and the field, feeding energy from the former to the latter during the matter-dominated era. We perform a numerical scan over the parameter space and find points that align with observations for both the inflationary CMB data and the late-time behaviour. The final dark energy density emerges from an interplay between the model parameters, without requiring the extreme fine-tuning of the cosmological constant in ΛCDM.",
keywords = "paper, dark energy theory, Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories, inflation, modified gravity",
author = "Konstantinos Dimopoulos and Alexandros Karam and Samuel S{\'a}nchez L{\'o}pez and Eemeli Tomberg",
year = "2022",
month = oct,
day = "24",
doi = "10.1088/1475-7516/2022/10/076",
language = "English",
volume = "2022",
journal = "J. Cosmol. Astroparticle Phys.",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "10",

}

RIS

TY - JOUR

T1 - Palatini R 2 quintessential inflation

AU - Dimopoulos, Konstantinos

AU - Karam, Alexandros

AU - Sánchez López, Samuel

AU - Tomberg, Eemeli

PY - 2022/10/24

Y1 - 2022/10/24

N2 - 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 later on it becomes the current dark energy. Combining the scalar sector with an ideal fluid, we study the cosmological evolution of the model from inflation all the way to dark energy domination. We interpret the results in the Einstein frame, where a coupling emerges between the fluid and the field, feeding energy from the former to the latter during the matter-dominated era. We perform a numerical scan over the parameter space and find points that align with observations for both the inflationary CMB data and the late-time behaviour. The final dark energy density emerges from an interplay between the model parameters, without requiring the extreme fine-tuning of the cosmological constant in ΛCDM.

AB - 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 later on it becomes the current dark energy. Combining the scalar sector with an ideal fluid, we study the cosmological evolution of the model from inflation all the way to dark energy domination. We interpret the results in the Einstein frame, where a coupling emerges between the fluid and the field, feeding energy from the former to the latter during the matter-dominated era. We perform a numerical scan over the parameter space and find points that align with observations for both the inflationary CMB data and the late-time behaviour. The final dark energy density emerges from an interplay between the model parameters, without requiring the extreme fine-tuning of the cosmological constant in ΛCDM.

KW - paper

KW - dark energy theory

KW - Gauss-Bonnet-Lovelock-Horndeski-Palatini etc gravity theories

KW - inflation

KW - modified gravity

U2 - 10.1088/1475-7516/2022/10/076

DO - 10.1088/1475-7516/2022/10/076

M3 - Journal article

VL - 2022

JO - J. Cosmol. Astroparticle Phys.

JF - J. Cosmol. Astroparticle Phys.

SN - 1475-7516

IS - 10

M1 - 076

ER -