33 citations · 81 across the 5 of their papers we have counts for
5 papers
Constraining ultra slow roll inflation using cosmological datasets
H. V. Ragavendra, Anjan Kumar Sarkar, Shiv K. Sethi
In recent years, the detection of gravitational waves by LIGO and PTA collaborations have raised the intriguing possibility of excess matter power at small scales. Such an increase…
Loop contributions to the scalar power spectrum due to quartic order action in ultra slow roll inflation
Suvashis Maity, H. V. Ragavendra, Shiv K. Sethi +1
[Abridged] In contemporary literature, the calculation of modifications to the inflationary scalar power spectrum due to the loops from the higher order interaction terms in the Ha…
Non-thermal moduli production during preheating in -attractor inflation models
Khursid Alam, Mar Bastero-Gil, Koushik Dutta +1
Production of gravitationally coupled light moduli fields must be suppressed in the early universe, so that its decay products do not alter Big Bang Nucleosynthesis (BBN) predictio…
Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
Sagarika Tripathy, Debika Chowdhury, H. V. Ragavendra +2
[Abridged] As is well known, in order to generate magnetic fields of observed amplitudes during inflation, the conformal invariance of the electromagnetic field has to be broken by…
Observing nulling of primordial correlations via the 21 cm signal
Shyam Balaji, H. V. Ragavendra, Shiv K. Sethi +2
The 21cm line emitted by neutral hydrogen (HI) during the Dark Ages carries imprints of pristine primordial correlations. In models of inflation driven by a single, canonical scala…