16 papers
Dynamical Baryogenesis in Rainbow Cosmology
Surendra Kumar Gour, Malay K. Nandy
We investigate baryogenesis in the framework of rainbow cosmology employing a complex scalar field with a softly broken global -symmetry. The modified dispersion relation of…
Parametric Resonance in Preheating: An Exact Numerical Study
Hrisikesh Thakur, Malay K. Nandy
Preheating after inflation proceeds through parametric resonance, leading to efficient particle production in scalar field models. In this work, we investigate the structure of par…
Singularity Resolution in Quantum Cosmology via Page-Wootters Formalism
Vishal, Malay K. Nandy
We investigate the problem of classical big bang singularity in a plane-symmetric Bianchi type-I universe within the Wheeler-DeWitt (WDW) framework of quantum gravity. To address t…
Non-Supersymmetric Baryogenesis from -Breaking Scalar Dynamics
Surendra Kumar Gour, Malay K. Nandy
We present a non-supersymmetric mechanism for baryogenesis driven by the nonlinear dynamics of a complex scalar field with generalized self-interaction potentials that explicitly b…
BMS transformed Quantum String Dynamics near a Black Hole
Nihar Ranjan Ghosh, Malay K. Nandy
Asymptotic symmetries are expected to leave subtle but physically meaningful imprints on quantum probes of gravity, yet their manifestation in near-horizon dynamics remains incompl…
Bohmian singularity resolution and quantum relaxation in Bianchi type-I quantum cosmology
Vishal, Malay K. Nandy
We investigate cosmological singularity resolution and relaxation dynamics within the Bohmian mechanics via the plane-symmetric Bianchi type-I minisuperspace model in the Wheeler-D…