Energy conditions for inhomogeneous EOS and its thermodynamics analysis with the resolution on finite time future singularity problems

A Kar, S Sadhukhan… - International Journal of …, 2021 - World Scientific
In this paper, we study two different cases of inhomogeneous EOS of the form pd= w (t) ρ d+
w 1 f (H, t). We derive the energy density of dark fluid and dark matter component for both the …

Hamiltonian formalism for bianchi type I model for perfect fluid as well as for the fluid with bulk and shearing viscosity

A Kar, S Sadhukhan - Available at SSRN 4431850, 2023 - papers.ssrn.com
Here in this paper we have proposed the Hamiltonian formalism of Bianchi type 1
cosmological model for different fluids including both viscous and non-viscous cases. We …

Hamiltonian formalism in Friedmann cosmology and its quantization

J Ren, XH Meng, L Zhao - Physical Review D—Particles, Fields, Gravitation …, 2007 - APS
We propose a Hamiltonian formalism for a generalized Friedmann-Robertson-Walker
cosmology model in the presence of both a variable equation of state parameter w (a) and a …

Soft Computing Artificial Intelligence of Schrödinger Time Independent Equation Arises in Wheeler–DeWitt Model of Quantum Cosmology

NU Basat, M Asghar - Computational Mathematics and Mathematical …, 2023 - Springer
Schrödinger time independent equation arises in Wheeler–DeWitt model of quantum
cosmology to develop a wave function for the corrections of cosmologies. In this work …

Quintessence Model Calculations for Bulkviscous Fluid and Low Value Predictions of Thecoefficient of Bulk Viscosity in General as Well as Modified Gravity With the …

S SADHUKHAN, A KAR - 2020 - preprints.org
In this paper we have defined the effect of bulk viscosity on Quintessence model and scaler
field potential as well as on classical field. We have shown the same effect for modified …

Quantizaçao de sistemas hamiltonianos via método de diferenças finitas

GA Monerat, LG Ferreira Filho, EV Silva… - Revista Brasileira de …, 2010 - SciELO Brasil
Propomos a introdução do método de diferenças finitas como tópico a ser abordado na
disciplina de mecânica quântica de um curso de graduação em física. O método é …

Chaplygin gas quantum universe in the presence of the cosmological constant

P Pedram, S Jalalzadeh - General Relativity and Gravitation, 2010 - Springer
We present a Chaplygin gas Friedmann-Robertson-Walker quantum cosmological model in
the presence of the cosmological constant. We apply the Schutz's variational formalism to …

Quantum cosmology of a Friedmann–Lemaitre–Robertson–Walker universe with radiation and its tomographic properties

C Stornaiolo - International Journal of Geometric Methods in …, 2022 - World Scientific
We introduce in this paper a tomographic analysis of the properties of a Friedmann–
Lemaitre–Robertson–Walker (FLRW) universe with a perfect fluid. We first review previous …

Quantum Cosmology with many fluids and the choice of cosmological time

GA Monerat, CGM Santos, FG Alvarenga… - Brazilian Journal of …, 2020 - Springer
In this work, we propose the quantization of a cosmological model describing the primordial
universe filled with five barotropic fluids, namely radiation, dust, vacuum, cosmic strings, and …

Quintessence Model with Bulk Viscosity and Some Predictions on the Coefficient of Bulk Viscosity and Gravitational Constant

S Sadhukhan, A Kar - Available at SSRN 4412282, 2023 - papers.ssrn.com
In this chapter we have defined the effect of bulk viscosity on Quintessence model and
scalar field potential as well as on classical field. We have shown the same effect for …