Dark energy from α-attractors: phenomenology and observational constraints

C García-García, EV Linder… - … of Cosmology and …, 2018 - iopscience.iop.org
The possibility of linking inflation and late cosmic accelerated expansion using the α-
attractor models has received increasing attention due to their physical motivation. In the …

Constraints on quintessence scalar field models using cosmological observations

W Yang, M Shahalam, B Pal, S Pan, A Wang - Physical Review D, 2019 - APS
We consider a variety of quintessence scalar field models in a homogeneous and isotropic
geometry of the Universe with zero spatial curvature aiming to provide stringent constraints …

Bayesian evidence for α-attractor dark energy models

FXL Cedeño, A Montiel, JC Hidalgo… - Journal of Cosmology …, 2019 - iopscience.iop.org
Dark energy models with tracker properties have gained attention due to the large range of
initial conditions leading to the current value of the dark energy density parameter. A well …

Gauss–Bonnet Inflation after Planck2018

N Rashidi, K Nozari - The Astrophysical Journal, 2020 - iopscience.iop.org
We study the primordial perturbations and reheating process in the models where the Gauss–
Bonnet (GB) term is nonminimally coupled to the canonical and noncanonical (DBI and …

-attractor potentials in loop quantum cosmology

G Levy, RO Ramos - Physical Review D, 2024 - APS
We perform in this work an analysis of the background dynamics for α-attractor models in the
context of loop quantum cosmology. Particular attention is given to the determination of the …

Cosmological Einstein–Maxwell model with -essence

O Razina, P Tsyba, B Meirbekov… - International Journal of …, 2019 - World Scientific
In this paper, we study the model of the late universe with the homogeneous, isotropic and
flat Friedmann–Robertson–Walker metric, where the source of the gravitational field is …

Preinflationary dynamics of an attractor in loop quantum cosmology

M Shahalam, M Sami, A Wang - Physical Review D, 2018 - APS
We systematically study the preinflationary dynamics of the spatially flat Friedmann-Lemaitre-
Robertson-Walker universe filled with a single scalar field that has the generalized α …

Observational Viability of an Inflation Model with E-model Nonminimal Derivative Coupling

K Nozari, N Rashidi - The Astrophysical Journal, 2018 - iopscience.iop.org
By starting with a two-fields model in which the fields and their derivatives are nonminimally
coupled to gravity, and then by using a conformal gauge, we obtain a model in which the …

Dark energy with oscillatory tracking potential: observational constraints and perturbative effects

A Joseph, R Saha - Monthly Notices of the Royal Astronomical …, 2022 - academic.oup.com
The cosmological models exhibiting tracker properties have great significance in the context
of dark energy as they can reach the present value of dark energy density from a wide range …

α-attractor dark energy in view of next-generation cosmological surveys

C García-García, P Ruíz-Lapuente… - … of Cosmology and …, 2019 - iopscience.iop.org
The α-attractor inflationary models are nowadays favored by CMB Planck observations.
Their similarity with canonical quintessence models motivates the exploration of a common …