40 citations · 41 across the 7 of their papers we have counts for
7 papers
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…
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…
Constraining Reheating Temperature, Inflaton-SM Coupling and Dark Matter Mass in Light of ACT DR6 Observations
Rajesh Mondal, Sourav Mondal, Ayan Chakraborty
We explore the phenomenological implications of the latest Atacama Cosmology Telescope (ACT) DR6 observations, in combination with Planck 2018, BICEP/Keck 2018, and DESI, on the ph…
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…
Probing a nonminimal coupling through superhorizon instability and secondary gravitational waves
Ayan Chakraborty, Subhasis Maiti, Debaprasad Maity
In this paper, we investigate the impact of scalar fluctuations () non-minimally coupled to gravity, , as a potential source of secondary gravitational waves (SGWs). Our…
Squeezing, Chaos and Thermalization in Periodically Driven Quantum Systems: The Case of Bosonic Preheating
Ayan Chakraborty, Debaprasad Maity
The phenomena of Squeezing and chaos have recently been studied in the context of inflation. We apply this formalism in the post-inflationary preheating phase. During this phase, i…
Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/ data
Ayan Chakraborty, Md Riajul Haque, Debaprasad Maity +1
We are in the era of precision cosmology which offers us a unique opportunity to investigate beyond standard model physics. Toward this endeavor, inflaton is assumed to be a perfec…