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Viscous cosmology for early-and late-time universe
I Brevik, Ø Grøn, J de Haro, SD Odintsov… - International Journal of …, 2017 - World Scientific
From a hydrodynamicist's point of view the inclusion of viscosity concepts in the macroscopic
theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an …
theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an …
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 …
deal of research into cosmological singularities, and in this brief review, we discuss all the …
Inflationary universe from perfect fluid and gravity and its comparison with observational data
We investigate the descriptions for the observables of inflationary models, in particular, the
spectral index of curvature perturbations, the tensor-to-scalar ratio, and the running of the …
spectral index of curvature perturbations, the tensor-to-scalar ratio, and the running of the …
[HTML][HTML] Late-time constraints on barotropic fluid cosmology
We investigate the cosmological implications of the Friedmann-Robertson-Walker (FRW)
model having a flat-spatial section with barotropic fluid. We examine the resulting …
model having a flat-spatial section with barotropic fluid. We examine the resulting …
Cosmic dynamics with late-time constraints on the parametric deceleration parameter model
We investigate the evolution of a flat Friedmann–Lemaitre–Robertson–Walker (FLRW)
model equipped with the matter content induced by the fluid having equation of state …
model equipped with the matter content induced by the fluid having equation of state …
Lagrangian formulation and implications of barotropic fluid cosmologies
In this paper, we investigate the behavior of cosmologies in homogeneous and isotropic
background with a barotropic fluid. We solve the continuity equation and study several …
background with a barotropic fluid. We solve the continuity equation and study several …
Revisiting fractional cosmology
Recently, the research community has been exploring fractional calculus to address
problems related to cosmology; in this approach, the gravitational action integral is altered …
problems related to cosmology; in this approach, the gravitational action integral is altered …
Cosmic dynamics of isotropic models with inhomogeneous EoS: A dynamical system perspective
We examine the homogeneous and isotropic models sourced by the fluid having an
inhomogenous equation of state (EoS) using qualitative methods. The flat Friedmann …
inhomogenous equation of state (EoS) using qualitative methods. The flat Friedmann …
Finite-time singularities in swampland-related dark-energy models
SD Odintsov, VK Oikonomou - Europhysics Letters, 2019 - iopscience.iop.org
In this work we shall investigate the singularity structure of the phase space corresponding
to an exponential quintessence dark-energy model recently related to swampland models …
to an exponential quintessence dark-energy model recently related to swampland models …
Cosmological singularities in gravity
The pursuit of understanding the mysteries surrounding dark energy has sparked significant
interest within the field of cosmology. While conventional approaches, such as the …
interest within the field of cosmology. While conventional approaches, such as the …