22 citations · 152 across the 22 of their papers we have counts for
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Dark photon -- Assisted Primordial Magnetogenesis
Debottam Nandi, Debajyoti Choudhury
Magnetic fields observed across cosmic scales are difficult to explain within conventional physics. A primordial origin is, thus, often assumed. While a nonminimal coupling of the…
Sub-Horizon Amplification of Curvature Perturbations: A New Route to Primordial Black Holes and Gravitational Waves
Debottam Nandi, Rohan Roy, Simran Yadav +1
The enhanced primordial scalar power spectrum is a widely studied mechanism for generating primordial gravitational waves (PGWs), also referred to as scalar-induced gravitational w…
Precision Inflationary Predictions: Impact of Accurate End-of-Inflation Dynamics
Debottam Nandi, Simran Yadav, Manjeet Kaur
The precision era of cosmology demands accurate theoretical predictions from inflationary models. In quantitative reheating analyses, inflationary observables depend sensitively on…
Exploring the Hubble Tension: A Novel Approach through Cosmological Observations
Darshan Kumar, Debajyoti Choudhury, Debottam Nandi
The simplest cosmological model (CDM) is well-known to suffer from the Hubble tension, namely an almost discrepancy between the (model-based) early-time determination of t…
Unifying inflationary and reheating solution
Manjeet Kaur, Debottam Nandi, Sharath Raghavan B
The conventional background solution for the evolution of a single canonical inflaton field performs admirably in extreme scenarios such as the slow-roll phase (where the slow-roll…
Inflation vs. Ekpyrosis -- comparing stability in general non-minimal theory
Debottam Nandi, Manjeet Kaur
The scalar field is considered to have dominated the early Universe. One subtle yet crucial requirement of this assumption is that the solution must be highly stable, i.e., indiffe…