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Quintessence in the Weyl-Gauss-Bonnet model

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Quintessence in the Weyl-Gauss-Bonnet model. / Terente Diaz, Jose; Dimopoulos, Konstantinos; Karciauskas, Mindaugas et al.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2024, No. 2, 040, 23.02.2024.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Terente Diaz, J, Dimopoulos, K, Karciauskas, M & Racioppi, A 2024, 'Quintessence in the Weyl-Gauss-Bonnet model', Journal of Cosmology and Astroparticle Physics, vol. 2024, no. 2, 040. https://doi.org/10.1088/1475-7516/2024/02/040

APA

Terente Diaz, J., Dimopoulos, K., Karciauskas, M., & Racioppi, A. (2024). Quintessence in the Weyl-Gauss-Bonnet model. Journal of Cosmology and Astroparticle Physics, 2024(2), Article 040. https://doi.org/10.1088/1475-7516/2024/02/040

Vancouver

Terente Diaz J, Dimopoulos K, Karciauskas M, Racioppi A. Quintessence in the Weyl-Gauss-Bonnet model. Journal of Cosmology and Astroparticle Physics. 2024 Feb 23;2024(2):040. doi: 10.1088/1475-7516/2024/02/040

Author

Terente Diaz, Jose ; Dimopoulos, Konstantinos ; Karciauskas, Mindaugas et al. / Quintessence in the Weyl-Gauss-Bonnet model. In: Journal of Cosmology and Astroparticle Physics. 2024 ; Vol. 2024, No. 2.

Bibtex

@article{cf404e7648b44923a7def624a46b0ee4,
title = "Quintessence in the Weyl-Gauss-Bonnet model",
abstract = "Quintessence models have been widely examined in the context of scalar-Gauss-Bonnet gravity, a subclass of Horndeski{\textquoteright}s theory, and were proposed as viable candidates for Dark Energy. However, the relatively recent observational constraints on the speed of gravitational waves c_GW have resulted in many of those models being ruled out because they predict c_GW ≠ c generally. While these were formulated in the metric formalism of gravity, we put forward a new quintessence model with the scalar-Gauss-Bonnet action but in Weyl geometry, where the connection is not metric compatible. We find the fixed points of the dynamical system under some assumptions and determine their stability via linear analysis. The past evolution of the Universe can be reproduced correctly, but the late Universe constraints on c_GW are grossly violated. Moreover, at these later stages tensor modes suffer from the gradient instabilities. We also consider the implications of imposing an additional constraint c_GW = c, but this does not lead to evolution that is consistent with cosmological observations.",
author = "{Terente Diaz}, Jose and Konstantinos Dimopoulos and Mindaugas Karciauskas and Antonio Racioppi",
year = "2024",
month = feb,
day = "23",
doi = "10.1088/1475-7516/2024/02/040",
language = "English",
volume = "2024",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - Quintessence in the Weyl-Gauss-Bonnet model

AU - Terente Diaz, Jose

AU - Dimopoulos, Konstantinos

AU - Karciauskas, Mindaugas

AU - Racioppi, Antonio

PY - 2024/2/23

Y1 - 2024/2/23

N2 - Quintessence models have been widely examined in the context of scalar-Gauss-Bonnet gravity, a subclass of Horndeski’s theory, and were proposed as viable candidates for Dark Energy. However, the relatively recent observational constraints on the speed of gravitational waves c_GW have resulted in many of those models being ruled out because they predict c_GW ≠ c generally. While these were formulated in the metric formalism of gravity, we put forward a new quintessence model with the scalar-Gauss-Bonnet action but in Weyl geometry, where the connection is not metric compatible. We find the fixed points of the dynamical system under some assumptions and determine their stability via linear analysis. The past evolution of the Universe can be reproduced correctly, but the late Universe constraints on c_GW are grossly violated. Moreover, at these later stages tensor modes suffer from the gradient instabilities. We also consider the implications of imposing an additional constraint c_GW = c, but this does not lead to evolution that is consistent with cosmological observations.

AB - Quintessence models have been widely examined in the context of scalar-Gauss-Bonnet gravity, a subclass of Horndeski’s theory, and were proposed as viable candidates for Dark Energy. However, the relatively recent observational constraints on the speed of gravitational waves c_GW have resulted in many of those models being ruled out because they predict c_GW ≠ c generally. While these were formulated in the metric formalism of gravity, we put forward a new quintessence model with the scalar-Gauss-Bonnet action but in Weyl geometry, where the connection is not metric compatible. We find the fixed points of the dynamical system under some assumptions and determine their stability via linear analysis. The past evolution of the Universe can be reproduced correctly, but the late Universe constraints on c_GW are grossly violated. Moreover, at these later stages tensor modes suffer from the gradient instabilities. We also consider the implications of imposing an additional constraint c_GW = c, but this does not lead to evolution that is consistent with cosmological observations.

U2 - 10.1088/1475-7516/2024/02/040

DO - 10.1088/1475-7516/2024/02/040

M3 - Journal article

VL - 2024

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 2

M1 - 040

ER -