Finite-time cosmological singularities and the possible fate of the Universe

J de Haro, S Nojiri, SD Odintsov, VK Oikonomou, S Pan - Physics Reports, 2023 - Elsevier
Singularities in any physical theory are either remarkable indicators of the unknown
underlying fundamental theory, or indicate a change in the description of the physical reality …

Recent advances in cosmological singularities

O Trivedi - Symmetry, 2024 - mdpi.com
The discovery of the Universe's late-time acceleration and dark energy has led to a great
deal of research into cosmological singularities, and in this brief review, we discuss all the …

Analysis of the tension problem in the Universe with viscous dark fluid

E Elizalde, M Khurshudyan, SD Odintsov… - Physical Review D, 2020 - APS
Two inhomogeneous single-fluid models for the Universe, which are able to naturally solve
the H 0 tension problem, are discussed. The analysis is based on a Bayesian Machine …

Phantom cosmology in an extended theory of gravity

SK Tripathy, B Mishra - Chinese Journal of Physics, 2020 - Elsevier
Some phantom cosmological models without big rip singularity have been constructed in a
simple extended theory of gravity. In the geometrical part of the action, a minimally coupled …

Constraints on prospective deviations from the cold dark matter model using a Gaussian Process

M Khurshudyan, E Elizalde - Galaxies, 2024 - mdpi.com
Recently, using Bayesian Machine Learning, a deviation from the cold dark matter model on
cosmological scales has been put forward. Such a model might replace the proposed non …

Black holes in the turbulence phase of viscous rip cosmology

I Brevik, M Jamil - International Journal of Geometric Methods in …, 2019 - World Scientific
We study the phantom fluid in the late universe, thus assuming the equation of state
parameter w to be less than− 1. The fluid is assumed to consist of two components, one …

Little Rip, Pseudo Rip and bounce cosmology from generalized equation of state in the universe with spatial curvature

AV Timoshkin, AV Yurov - arxiv preprint arxiv:2305.02796, 2023 - arxiv.org
We consider the Little Rip (LR), Pseudo Rip (PR) and bounce cosmological models in the
Friedmann-Robertson-Walker (FRW) metric with nonzero spatial curvature. We describe the …

Little rip, pseudo rip and bounce cosmology with generalized equation of state in non-standard backgrounds

O Trivedi, AV Timoshkin - The European Physical Journal C, 2024 - Springer
The discovery of universe's late-time acceleration and dark energy has overseen a great
deal of research into cosmological singularities and particularly future singularities. Perhaps …

An approach to cold dark matter deviation and the tension problem by using machine learning

E Elizalde, J Gluza, M Khurshudyan - arxiv preprint arxiv:2104.01077, 2021 - arxiv.org
In this work, two different models, one with cosmological constant $\Lambda $, and baryonic
and dark matter (with $\omega_ {dm}\neq 0$), and the other with an $ X $ dark energy (with …

Anisotropic Born–Infeld-f (R) cosmologies

S Kibaroğlu - Physics of the Dark Universe, 2025 - Elsevier
In this paper, we investigate anisotropic cosmological solutions within the framework of Born–
Infeld-f (R) gravity, a modification of general relativity that incorporates higher-order …