4 papers
Gaussian process reconstruction of scalar field dynamics from recent cosmological data
Afaq Maqsood, Sonej Alam, Md. Wali Hossain
We reconstruct the late-time expansion history and dark energy dynamics using available cosmological data. We consider dark energy as an effective minimally coupled canonical scala…
Dissipative Cosmology and the Nature of Dark Energy: Insights from Bulk Viscosity with DESI DR2 observations
Shahnawaz A. Adil, Sonej Alam, Somasri Sen +1
We explore a cosmological model in which dark energy is described by a bulk viscous fluid, providing a dissipative mechanism for late-time cosmic acceleration. Considering both min…
Beyond CPL: Evidence for dynamical dark energy in three-parameter models
Sonej Alam, Md. Wali Hossain
We introduce two three-parameter extensions of the minimal Akhtar-Hossain (mAH) dark energy parametrization, termed modified minimal AH (MmAH1 and MmAH2), which provide a smooth an…
Bouncing Cosmologies in modified gravity with space time torsion
Sonej Alam, Somasri Sen, Soumitra Sengupta
We explore the possibility of realizing a non-singular bounce in the early universe within the framework of modified gravity with spacetime torsion. In Einstein Cartan theory, tors…