Viscous modified Chaplygin gas with spherical top-hat collapse in modified theories of gravity
The work explores the dynamics of a spherically symmetric perturbation of viscous modified
Chaplygin gas (VMCG) in different gravity theories within the spherical top hat collapse …
Chaplygin gas (VMCG) in different gravity theories within the spherical top hat collapse …
Symmetry-based study and dynamics of casual bulk viscous matter-dominated universe
T Nandi, A Choudhuri - The European Physical Journal C, 2024 - Springer
The dynamics of cosmological expansion is studied for a spatially flat matter-dominated
universe filled with barotropic casual bulk viscous fluid. The evolution equation for the …
universe filled with barotropic casual bulk viscous fluid. The evolution equation for the …
Power-law inflation with minimal and nonminimal coupling
M Bairagi, A Choudhuri - The European Physical Journal Plus, 2018 - epjplus.epj.org
Power-law inflationary scenarios based on minimal and non-minimal coupling of a scalar
field to gravity with exponential-and power-law potential, respectively, are studied using the …
field to gravity with exponential-and power-law potential, respectively, are studied using the …
Study on early inflationary phase using a new form of non-canonical scalar field model
M Bairagi, A Choudhuri - General Relativity and Gravitation, 2021 - Springer
We study the inflationary phase of the early universe as modeled by a non-canonical scalar
field. The homogeneous scalar field equation is derived from a Lagrangian density …
field. The homogeneous scalar field equation is derived from a Lagrangian density …
Early inflationary phase with canonical and noncanonical scalar fields: a symmetry-based approach
M Bairagi, A Choudhuri - Gravitation and Cosmology, 2020 - Springer
We study the early inflationary phase of the universe driven by noncanonical scalar field
models using an exponential potential. The noncanonical scalar field models are …
models using an exponential potential. The noncanonical scalar field models are …
The minimally coupled and canonical scalar field inflationary cosmology with negative quadratic and modified higgs-like potentials: a symmetry based approach
A Choudhuri, M Bairagi - International Journal of Theoretical Physics, 2022 - Springer
The inflationary model based on a single scalar field with a quadratic potential V (ϕ)∼ ϕ 2 is
disfavored by the recent Planck constraints on the values of scalar spectral index, and the …
disfavored by the recent Planck constraints on the values of scalar spectral index, and the …