359 citations · 2k across the 45 of their papers we have counts for
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Ultra-low mass PBHs in the early universe can explain the PTA signal
Nilanjandev Bhaumik, Rajeev Kumar Jain, Marek Lewicki
Pulsar Timing Array collaborations have recently announced the discovery of a stochastic gravitational wave background (SGWB) at nanohertz frequencies. We analyze the GW signals fr…
Inflationary cross-correlations of a non-minimal spectator and their soft limits
P. Jishnu Sai, Rajeev Kumar Jain
Light spectator fields may not be dynamically relevant for the inflationary phase of the early universe, but they can still induce interesting imprints on cosmological observables.…
Primordial Black Holes Dark Matter and Secondary Gravitational Waves from Warm Higgs-G Inflation
Richa Arya, Rajeev Kumar Jain, Arvind Kumar Mishra
We explore the role of dissipative effects during warm inflation leading to the small-scale enhancement of the power spectrum of curvature perturbations. In this paper, we specific…
Towards a possible solution to the Hubble tension with Horndeski gravity
Yashi Tiwari, Basundhara Ghosh, Rajeev Kumar Jain
The Hubble tension refers to the discrepancy in the value of the Hubble constant inferred from the cosmic microwave background observations, assuming the concordance CDM m…