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Dark energy in light of the early JWST observations: case for a negative cosmological constant?
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 …
surprisingly abundant population of very massive galaxies at extremely high redshift, which …
Robust preference for Dynamical Dark Energy in DESI BAO and SN measurements
Abstract Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when
combined with Cosmic Microwave Background (CMB) data from Planck and two different …
combined with Cosmic Microwave Background (CMB) data from Planck and two different …
The state of the dark energy equation of state circa 2023
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 …
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 …
the nonmetricity of a flat, symmetric, but not metric-compatible affine connection, have been …
Revisiting cosmologies in teleparallelism
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 …
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 …
extension of symmetric teleparallel gravity, with Q the non-metricity and T the trace of the …
Cosmological inflation in f (Q, T) gravity
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 …
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
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 …
cosmic acceleration. This model, an extension of symmetric teleparallel gravity, introduces …
[HTML][HTML] Reconstruction of f (Q, T) Lagrangian for various cosmological scenario
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 …
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
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 …
is another promising candidate for dark energy. We investigate the GCG scenario coupled …