44 citations · 266 across the 18 of their papers we have counts for
19 papers
Interacting dark sector: a dynamical system perspective
Chonticha Kritpetch, Nandan Roy, Narayan Banerjee
We investigate the interaction between the dark sectors from the point of view of a dynamical system analysis. A general setup for interacting dark energy models that incorporates…
Dynamical Analysis of the Dirac-Born-Infeld type of Tachyon field minimally coupled with barotropic fluid using EOS parametrization of a field
Saddam Hussain, Saikat Chakraborty, Nandan Roy +1
In this paper, we present a dynamical system analysis of the tachyon dark energy model by parametrization of the equation of state (EoS) of the dark energy. The choice of parametri…
Exploring the Possibility of Interacting Quintessence Model as an Alternative to the CDM Model
Nandan Roy
This study examines interacting quintessence dark energy models and their observational constraints for a general parameterization of the quintessence potential, which encompasses…
Dynamical systems analysis of tachyon dark energy model from a new perspective
Saddam Hussain, Saikat Chakraborty, Nandan Roy +1
In this work we present a new scheme to study the tachyon dark energy model using dynamical systems analysis by considering parametrization of the equation of state(EoS) of the dar…
Quintessence or Phantom: Study of scalar field dark energy models through a general parametrization of the Hubble parameter
Nandan Roy, Sangita Goswami, Sudipta Das
In this work we propose a simple general parametrization scheme of the Hubble parameter for the scalar field dark energy models. In our approach it is possible to incorporate both…
Tracker phantom field and a cosmological constant: dynamics of a composite dark energy model
Francisco X. Linares Cedeño, Nandan Roy, L. Arturo Ureña-López
In this work, we study tracker phantom dark energy models with a general parameterization of the scalar potentials. Our analysis also considers the scenario of having both phantom…
Generalized tracker quintessence models for dark energy
L. Arturo Urena-Lopez, Nandan Roy
We study the dynamical properties of tracker quintessence models using a general parametrization of their corresponding potentials, and show that there is a general condition for t…
Dynamical System Analysis for Steep Potentials
Sudipta Das, Manisha Banerjee, Nandan Roy
In this work we have performed the dynamical system analysis for steep(er) exponential potentials considering different values of the steepness index . We have performed the ana…
The arbitrariness of potentials in interacting quintessence models
Nandan Roy, Kazuharu Bamba
We study the interacting quintessence model with two different types of interaction by introducing a general parameterization of the quintessence potentials. The form of the quinte…
Second Order Perturbative Effects on the Acoustic Geometry
Nandan Roy, Shivani Singh, Sankhasubhra Nag +1
In this work, we have studied the effect of higher order perturbations, particularly the second order in details, on the sonic horizon. We have considered two different schemes of…
New general parametrization of quintessence fields and its observational constraints
Nandan Roy, Alma X. Gonzalez-Morales, L. Arturo Urena-Lopez
We present a new parameterization of quintessence potentials for dark energy based directly upon the dynamical properties of the equations of motion. Such parameterization arises n…
Dynamical systems analysis of phantom models
Nandan Roy, Nivedita Bhadra
In this work, we study the dynamical systems analysis of phantom dark energy models considering a general potential. The stability analysis of the system shows that there is only o…
Extended Phase Space Analysis of Interacting Dark Energy Models in Loop Quantum Cosmology
Hmar Zonunmawia, Wompherdeiki Khyllep, Nandan Roy +2
The present work deals with the dynamical system investigation of interacting dark energy models (quintessence and phantom) in the framework of Loop Quantum Cosmology by taking int…
Generalized Brans-Dicke Theory: A Dynamical Systems Analysis
Nandan Roy, Narayan Banerjee
The stability criteria for the generalized Brans-Dicke cosmology in a spatially flat, homogeneous and isotropic cosmological model is discussed in the presence of a perfect fluid.…
Dynamical Systems Analysis of Various Dark Energy Models
Nandan Roy
In this thesis, we used dynamical systems analysis to find the qualitative behaviour of some dark energy models. Specifically, dynamical systems analysis of quintessence scalar fie…
Phase space analysis of a holographic dark energy model
Nandan Roy, Narayan Banerjee
The stability of interacting holographic dark energy model is discussed. It is found that for some class of the rate of interaction between dark matter and dark energy, the system…
Dynamical systems study of Chameleon scalar field
Nandan Roy, Narayan Banerjee
The present work is an extensive study of the viable stable solutions of chameleon scalar field models leading to possibilities of an accelerated expansion of the universe. It is f…
Quintessence Scalar Field: A Dynamical Systems Study
Nandan Roy, Narayan Banerjee
The present work deals with a dynamical systems study of quintessence potentials leading to the present accelerated expansion of the universe. The principal interest is to check fo…
Tracking quintessence: a dynamical systems study
Nandan Roy, narayan Banerjee
With the tracking condition, the stability of quintessence solutions are examined. It is found that there is only one physically relevant fixed point for the system generically. Tw…