3 papers
hep-ph2026
Dark matters are Inert, or FIMPy, or WIMPy or UFOy: An inflationary gravitational particle production
Ayan Chakraborty, Debaprasad Maity, Rajesh Mondal
In this letter, we explore the phenomenological impact of inflationary gravitational particle production in the physics of Dark Matter (DM). Large-scale DM fluctuations generated d…
astro-ph.CO2025
Nonminimal infrared gravitational reheating in light of ACT observation
Ayan Chakraborty, Debaprasad Maity, Rajesh Mondal
Inflation is known to produce large infrared scalar fluctuations. Further, if a scalar field is non-minimally coupled with gravity through , those infrared modes expe…
gr-qc2025
Generalizing the Bogoliubov vs Boltzmann approaches in gravitational production
Ayan Chakraborty, Simon Clery, Md Riajul Haque +2
We investigate the spectral behavior of scalar fluctuations generated by gravity during inflation and the subsequent reheating phase. We consider a non-perturbative Bogoliubov trea…