3 citations · 3 across the 4 of their papers we have counts for
10 papers
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…
-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…
Constraints on DBI dark energy with chameleon mechanism
Burin Gumjudpai, Nandan Roy, John Ward
In this work, we investigate the Dirac--Born--Infeld (DBI) scalar field model with and without the inclusion of the chameleon mechanism in light of the latest cosmological observat…
Dynamical Systems in Cosmology: Reviewing An Alternative Approach
Nandan Roy, L. Arturo Ureña-López
Dark energy is one of the deepest puzzles in modern cosmology, and mounting evidence suggests that it is not just a cosmological constant but a genuinely dynamical component. Altho…
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…
Chiellini-Integrable Cosmologies with Phantom Divide Crossing
Soumya Chakrabarti, Nandan Roy
We investigate exact cosmological solutions with a massive scalar field minimally coupled to the Einstein-Hilbert action in General Relativity. For an extended Higgs-like scalar se…