Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Taoufik Ouali"'
Publikováno v:
Physics Letters B, Vol 859, Iss , Pp 139113- (2024)
In this paper, we observationally test the f(Q) gravity model at both background and perturbation levels using Pantheon+, Hubble measurements, and Redshift Space Distortion Data. We obtain the best-fit parameters by solving numerically the modified F
Externí odkaz:
https://doaj.org/article/ad3db69657cb4692986476af5248a9a4
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-16 (2024)
Abstract In this paper, we explore one of Einstein’s alternative formulations which involves the non-metricity scalar, Q, within the framework of f(Q) theory. Our study focuses on solving the modified Friedmann equations for the case of dust matter
Externí odkaz:
https://doaj.org/article/b36f349363034505b4760012845c9709
Publikováno v:
Nuclear Physics B, Vol 940, Iss , Pp 10-33 (2019)
We study the dynamical system approach of non-minimally coupled scalar field to induced gravity on the brane in the framework of holographic cosmology. In this context, we derive the modified Friedmann equation and the equation of motion. The dynamic
Externí odkaz:
https://doaj.org/article/eac54f8144c84ec6bf3ec9936f75f6d6
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 4, Pp 1-11 (2018)
Abstract The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter c
Externí odkaz:
https://doaj.org/article/c5d1496f26984fec80348e8c36893550
Publikováno v:
General Relativity and Gravitation. 55
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82fa85cb5ca08cd42d2899057332a13b
https://doi.org/10.1007/s10714-022-03055-7
https://doi.org/10.1007/s10714-022-03055-7
Publikováno v:
Gravitation and Cosmology. 26:379-386
We use the dynamical system method in order to investigate the dynamics of a non-minimally coupled tachyon field within induced gravity on the brane in a holographic cosmological context. Assuming an exponential potential and a monomial form of the n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fa1211814a1f7971580e1bbd5bf3b55
https://doi.org/10.1134/s0202289320040039
https://doi.org/10.1134/s0202289320040039
We consider warm inflation in the context of holographic cosmology. The weak and the strong dissipative regime are analysed in the slow-roll approximation and within what is known as intermediate inflation. For an appropriate choice of the equation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a1ed4d65586495b832cdef7a4e326c
We derive a Higgs inflationary model in the context of holographic cosmology, where we consider a universe filled with a Higgs field non-minimally coupled to gravity in a slow-roll regime. The amplitude of density (scalar) perturbations is calculated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fae72099812591d51a363108a3c5272
http://arxiv.org/abs/2012.04342
http://arxiv.org/abs/2012.04342
Publikováno v:
Physics of the Dark Universe. 34:100907
In this paper, we consider three phantom dark energy models, in the context of interaction between the dark components namely cold dark matter (CDM) and dark energy (DE). The first model, known as w d CDM can induce a big rip singularity (BR) while t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd15ab35e97e2d4400e2eb973c8cd402
https://doi.org/10.1016/j.dark.2021.100907
https://doi.org/10.1016/j.dark.2021.100907
We investigate observational constraints on inflationary parameters in the context of an holographic cosmology with an induced gravity correction. We consider two situations where a universe is firstly filled with a scalar field and secondly with a t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::febc95dd61acb0e2d55c72755b07899e
http://arxiv.org/abs/1904.06282
http://arxiv.org/abs/1904.06282