Dark energy in light of the early JWST observations: case for a negative cosmological constant?

SA Adil, U Mukhopadhyay, AA Sen… - Journal of Cosmology …, 2023‏ - iopscience.iop.org
Early data from the James Webb Space Telescope (JWST) has uncovered the existence of a
surprisingly abundant population of very massive galaxies at extremely high redshift, which …

Robust preference for Dynamical Dark Energy in DESI BAO and SN measurements

W Giarè, M Najafi, S Pan, E Di Valentino… - … of Cosmology and …, 2024‏ - iopscience.iop.org
Abstract Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when
combined with Cosmic Microwave Background (CMB) data from Planck and two different …

The state of the dark energy equation of state circa 2023

LA Escamilla, W Giarè, E Di Valentino… - … of Cosmology and …, 2024‏ - iopscience.iop.org
We critically examine the state of current constraints on the dark energy (DE) equation of
state (EoS) w. Our study is motivated by the observation that, while broadly consistent with …

General covariant symmetric teleparallel cosmology

M Hohmann - Physical Review D, 2021‏ - APS
Symmetric teleparallel gravity theories, in which the gravitational interaction is attributed to
the nonmetricity of a flat, symmetric, but not metric-compatible affine connection, have been …

Revisiting cosmologies in teleparallelism

F D'Ambrosio, L Heisenberg… - Classical and Quantum …, 2021‏ - iopscience.iop.org
We discuss the most general field equations for cosmological spacetimes for theories of
gravity based on non-linear extensions of the non-metricity scalar and the torsion scalar. Our …

Cosmological perturbation theory in f (Q, T) gravity

A Nájera, A Fajardo - Journal of Cosmology and Astroparticle …, 2022‏ - iopscience.iop.org
We developed the cosmological linear theory of perturbations for f (Q, T) gravity, which is an
extension of symmetric teleparallel gravity, with Q the non-metricity and T the trace of the …

Cosmological inflation in f (Q, T) gravity

M Shiravand, S Fakhry, M Farhoudi - Physics of the Dark Universe, 2022‏ - Elsevier
We study the cosmological inflation within the context of f (Q, T) gravity, wherein Q is the
nonmetricity scalar and T is the trace of the matter energy–momentum tensor. By choosing a …

Constraints on bulk viscosity in f (Q, T) gravity from H (z)/Pantheon+ data

M Koussour, A Errehymy, O Donmez… - Physics of the Dark …, 2024‏ - Elsevier
In this study, we investigate the role of bulk viscosity in f (Q, T) gravity in explaining late-time
cosmic acceleration. This model, an extension of symmetric teleparallel gravity, introduces …

[HTML][HTML] Reconstruction of f (Q, T) Lagrangian for various cosmological scenario

GN Gadbail, S Arora, PK Sahoo - Physics Letters B, 2023‏ - Elsevier
The variety of theories that can account for the dark energy phenomenon encourages
current research to concentrate on a more in-depth examination of the potential impacts of …

Generalized Chaplygin gas and accelerating universe in f (Q, T) gravity

GN Gadbail, S Arora, PK Sahoo - Physics of the Dark Universe, 2022‏ - Elsevier
The generalized Chaplygin gas (GCG), which has an unusual perfect fluid equation of state,
is another promising candidate for dark energy. We investigate the GCG scenario coupled …