7 citations · 14 across the 9 of their papers we have counts for
9 papers
Spectral Fingerprints Beyond Degeneracies in Primordial Gravitational-Wave Sources
Subhasis Maiti
Stochastic gravitational-wave backgrounds from different primordial mechanisms can exhibit identical peak frequencies and amplitudes, leaving their origin degenerate. We show that…
The Magnetic Origin of Primordial Black Holes: Ultralight PBHs and Secondary GWs
Subhasis Maiti, Debaprasad Maity
Ultralight primordial black holes (PBHs) provide a compelling window into early-Universe cosmology. Following our earlier work, we explore a mechanism for the formation of ultralig…
Gravitational Waves from Post-Inflationary Magnetism: Direct and Scalar-Induced Contributions
Subhasis Maiti
We study stochastic gravitational waves generated in a post-inflationary magnetogenesis scenario with time-dependent gauge couplings during inflation and reheating. In this setup,…
The Magnetic Origin of Primordial Black Holes: A Viable Dark Matter Scenario
Subhasis Maiti, Debaprasad Maity
Primordial Black Holes (PBHs) are compelling candidates for explaining the present-day relic abundance of cold dark matter (CDM), yet their formation typically requires finely tune…
Magnetogenesis from Sawtooth Coupling: Gravitational Wave Probe of Reheating
Subhasis Maiti
The detection of gravitational waves (GWs) by LIGO-Virgo and pulsar timing arrays (PTAs) has opened a new window into early universe cosmology. Yet, the origin of large-scale magne…
Probing Reheating Phase via Non-Helical Magnetogenesis and Secondary Gravitational Waves
Subhasis Maiti, Debaprasad Maity, Rohan Srikanth
In the past two decades, significant advancements have been made in observational techniques to enhance our understanding of the universe and its evolutionary processes. However, o…
Minimal Magnetogenesis: The Role of Inflationary Perturbations and ALPs, and Its Gravitational Wave Signatures
Subhasis Maiti, Debaprasad Maity, Rohan Srikanth
Any attempt to understand the ubiquitous nature of the magnetic field in the present universe seems to lead us towards its primordial origin. For large-scale magnetic fields, howev…
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…
Constraining inflationary magnetogenesis and reheating via GWs in light of PTA data
Subhasis Maiti, Debaprasad Maity, L. Sriramkumar
By leveraging the limits on primordial magnetic fields (PMFs), their contributions to secondary gravitational waves (GWs), and the recent observations by the pulsar timing arrays (…