399 citations · 799 across the 25 of their papers we have counts for
26 papers
Tachyonic dark energy- Constraints from current observations
Ramanpreet Singh, Athul CN, H. K. Jassal
Recent observations from the DESI survey have reignited the debate on the true nature of dark energy, challenging the standard model of cosmology. The results suggest a preference…
Inference of cosmological models with principal component analysis
Ranbir Sharma, H K Jassal
Determination of cosmological parameters is a major goal in cosmology at present. The availability of improved data sets necessitates the development of novel statistical tools to…
Bouncing and collapsing universes dual to late-time cosmological models
Dipayan Mukherjee, H. K. Jassal, Kinjalk Lochan
We use the Jordan frame-Einstein frame correspondence to explore dual universes with contrasting cosmological evolutions. We study the mapping between Einstein and Jordan frames wh…
Dual Theories of Quintessence : Expansion-Collapse Duality
Dipayan Mukherjee, H. K. Jassal, Kinjalk Lochan
The accelerated expansion of the universe demands presence of an exotic matter, namely the dark energy. Though the cosmological constant fits this role very well, a scalar field mi…
Tachyonic vs Quintessence dark energy: linear perturbations and CMB data
Manvendra Pratap Rajvanshi, Avinash Singh, H. K. Jassal +1
We use linear perturbation theory to study perturbations in dynamical dark energy models. We compare quintessence and tachyonic dark energy models with identical background evoluti…
Reconstruction of late-time cosmology using Principal Component Analysis
Ranbir Sharma, Ankan Mukherjee, H. K. Jassal
We reconstruct late-time cosmology using the technique of Principal Component Analysis (PCA). In particular, we focus on the reconstruction of the dark energy equation of state fro…