f (T) teleparallel gravity and cosmology
Over recent decades, the role of torsion in gravity has been extensively investigated along
the main direction of bringing gravity closer to its gauge formulation and incorporating spin …
the main direction of bringing gravity closer to its gauge formulation and incorporating spin …
Exploring bouncing cosmologies with cosmological surveys
YF Cai - Science China Physics, Mechanics & Astronomy, 2014 - Springer
From recent observational data two significant directions have been made in the field of
theoretical cosmology recently. First, we are now able to make use of present observations …
theoretical cosmology recently. First, we are now able to make use of present observations …
Towards a nonsingular bouncing cosmology
We present a nonsingular bouncing cosmology using single scalar field matter with non-
trivial potential and non-standard kinetic term. The potential sources a dynamical attractor …
trivial potential and non-standard kinetic term. The potential sources a dynamical attractor …
Bouncing galileon cosmologies
We present nonsingular, homogeneous and isotropic bouncing solutions of the conformal
Galileon model. We show that such solutions necessarily begin with a radiation-dominated …
Galileon model. We show that such solutions necessarily begin with a radiation-dominated …
Homogeneous and anisotropic cosmologies with affine EoS: a dynamical system perspective
A Singh - The European Physical Journal C, 2023 - Springer
We study a class of homogeneous and anisotropic geometries with affine equation of state
(EoS) for different physically plausible scenarios of the universe evolution using dynamical …
(EoS) for different physically plausible scenarios of the universe evolution using dynamical …
The matter bounce curvaton scenario
YF Cai, R Brandenberger, X Zhang - Journal of Cosmology and …, 2011 - iopscience.iop.org
Massless scalar fields originating in a quantum vacuum state acquire a scale-invariant
spectrum of fluctuations in a matter-dominated contracting universe. We show that these …
spectrum of fluctuations in a matter-dominated contracting universe. We show that these …
Dynamical analysis of anisotropic scalar-field cosmologies for a wide range of potentials
CR Fadragas, G Leon… - Classical and Quantum …, 2014 - iopscience.iop.org
We perform a detailed dynamical analysis of anisotropic scalar-field cosmologies, and in
particular of the most significant Kantowski–Sachs, locally rotationally symmetric (LRS) …
particular of the most significant Kantowski–Sachs, locally rotationally symmetric (LRS) …
Aspects of some Rastall cosmologies
A Singh, KC Mishra - The European Physical Journal Plus, 2020 - Springer
Rastall gravity paradigm producing mechanism for realizing singular and non-singular
cosmologies has been investigated. A solution in Rastall gravity with flat spatial sections …
cosmologies has been investigated. A solution in Rastall gravity with flat spatial sections …
Qualitative aspects of Kantowski–Sachs cosmologies with cosmological constant and stiff fluid
A Singh - The European Physical Journal Plus, 2023 - Springer
Abstract Homogeneous and anisotropic Kantowski–Sachs model sourced by a stiff fluid and
cosmological constant has been explored for different possible scenarios of the universe …
cosmological constant has been explored for different possible scenarios of the universe …
Dynamics of the anisotropic Kantowsky–Sachs geometries in Rn gravity
G Leon, EN Saridakis - Classical and Quantum Gravity, 2011 - iopscience.iop.org
We construct general anisotropic cosmological scenarios governed by an f (R) gravitational
sector. Focusing then on Kantowski–Sachs geometries in the case of R n-gravity, and …
sector. Focusing then on Kantowski–Sachs geometries in the case of R n-gravity, and …