Abstract We implement Crossing Statistics to reconstruct in a model-agnostic manner the
expansion history of the universe and properties of dark energy, using DESI Data Release 1 …

The idea of a rapid sign-switching cosmological constant (mirror AdS-dS transition) in the
late universe at z∼ 1.7, known as the Λ s CDM model, has significantly improved the fit to …

In this work, we investigate a two-parameter extension of the Λ s CDM model, as well as the
ΛCDM model for comparison, by allowing variations in the effective number of neutrino …

We parameterize the Hubble function by adding Hermitian wavelets to the Hubble radius of
$\Lambda $ CDM. This allows us to build Hubble functions that oscillate around $\Lambda …

In this work, we investigate whether the baryon acoustic oscillation (BAO) measurements
from redshift surveys, like the Sloan Digital Sky Survey (SDSS), and the Dark Energy …

In holographic dark energy (HDE) models, infrared cut-offs with derivatives of the Hubble
parameter, such as the Granda–Oliveros cut-off, offer a coherent explanation for late-time …

While teleparallel $ f (T) $ gravity has shown considerable potential in addressing
cosmological tensions, such as the $ H_0 $ and $ S_8 $ discrepancies, we explore …

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 …

In the current era of precision cosmology, the persistence of cosmological tensions, most
notably the Hubble tension and the $ S_8 $ tension, challenges the standard $\Lambda …

Cohen, Kaplan, and Nelson's influential paper established that the UV-IR cut-offs cannot be
arbitrarily chosen but are constrained by the relation $\Lambda^ 2 L\lesssim M_p $. Here …