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5 papers
What new physics can we extract from inflation using the ACT DR6 and DESI DR2 Observations?
Sayantan Choudhury, Gulnur Bauyrzhan, Swapnil Kumar Singh +1
We present a comprehensive analysis of inflationary models in light of projected sensitivities from forthcoming CMB and gravitational wave experiments, incorporating data from rece…
Reevaluation of Inflationary Dynamics in Extended General Relativity with Perturbatively and Tensorially Structured Conformal Metric
Swapnil K. Singh, Saleh O. Allehabi, Azzah A. Alshehri +2
Based on the conventional metric tensor and driven by a nearly constant energy density, cosmic inflation, characterized by a remarkably accelerated expansion, was proposed as an ea…
Quantum-Deformed Phase-Space Geometry and Emergent Inflation in Effective Four-Dimensional Spacetime
Swapnil Kumar Singh, Saleh O. Allehabi, Azzah A. Alshehri +2
A phase-space approach to quantum-deformed gravity is developed. Following its reduction to an effective four-dimensional spacetime structure, we utilize it in reanalyzing the cosm…
Quintessential Inflation in Light of ACT DR6
Sayantan Choudhury, Swapnil Kumar Singh, Satish Kumar Sahoo
We perform a precision investigation of smooth quintessential inflation in which a single canonical scalar field unifies the two known phases of cosmic acceleration. Using a CMB-no…
Symmetry-Protected -Attractor Hybrid Inflation in Supergravity and Constraints from ACT DR6 and DESI DR2
Swapnil Kumar Singh
We present a symmetry-protected supergravity effective realization of hybrid -attractor inflation with a sequestered Stückelberg uplift. The model contains four chiral multiplet…