5 citations · 8 across the 6 of their papers we have counts for
7 papers
Hypersurface Anchored Variational Principle for General Relativity
Prasanta Sahoo
A hypersurface anchored variational extension of General Relativity is formulated in which the Einstein-Hilbert action is supplemented by a diffeomorphism invariant functional supp…
-CDM: A Minimal Deformation of CDM with Scalar Field Reconstruction
Phichayoot Baisri, Nandan Roy, Prasanta Sahoo +2
Recent DESI BAO observations provide intriguing hints that dark energy may be dynamical in nature. To investigate deviations of the dark energy equation of state (EoS) from $w = -1…
Global Dynamical Structure of EinsteinScalar Cosmological Systems
Prasanta Sahoo
In this work, a global dynamical analysis of spatially flat FLRW cosmologies driven by a canonical scalar field minimally coupled to gravity is presented. Under suitable regularity…
CosmoDS: A Python toolkit for constraining cosmological models via dynamical systems analysis with Cobaya
Nandan Roy, Prasanta Sahoo
We present a toolkit, CosmoDS, designed to study cosmological models at the background level using dynamical system analysis within the Cobaya framework. Dynamical system analysis…
Stability Protected Phantom Bound in Expansion Modulated Cosmology
Prasanta Sahoo
Recent cosmological observations, including DESI Data Release 2 (DR2) \cite{DESIDR2}, allow for mild redshift evolution of the dark energy equation of state (EoS), motivating renew…
Quintom Dark Energy: Future Attractor and Phantom Crossing in Light of DESI DR2 Observation
Phusuda Thanankullaphong, Prasanta Sahoo, Prajwal Hassan Puttasiddappa +1
We study the late-time cosmological dynamics of a two-field dark energy model consisting of a canonical quintessence scalar field and a phantom scalar field in a spatially flat FLR…
Quintessence scalar field and cosmological constant: Dynamics of a multi-component dark energy model
Prasanta Sahoo, Nandan Roy, Himadri Shekhar Mondal
This study explores the dynamics and phase-space behavior of a multi-component dark energy model, where the dark sector consists of a minimally coupled canonical scalar field and t…