25 citations · 47 across the 7 of their papers we have counts for
11 papers · 1 filter
Inflationary magnetogenesis beyond slow-roll and its induced gravitational waves
Bill Atkins, Debika Chowdhury, Alisha Marriott-Best +1
The origin of magnetic fields observed on both astrophysical and cosmological scales is a compelling problem that has the potential to shed light on the early Universe. We analytic…
Cross-correlation between the curvature perturbations and magnetic fields in pure ultra slow roll inflation
Sagarika Tripathy, Debika Chowdhury, H. V. Ragavendra +1
Motivated by the aim of producing significant number of primordial black holes, over the past few years, there has been a considerable interest in examining models of inflation inv…
Exploring cosmological gravitational wave backgrounds through the synergy of LISA and ET
Alisha Marriott-Best, Debika Chowdhury, Anish Ghoshal +1
The gravitational wave (GW) interferometers LISA and ET are expected to be functional in the next decade(s), possibly around the same time. They will operate over different frequen…
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…
On the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
Sagarika Tripathy, Debika Chowdhury, Rajeev Kumar Jain +1
Primordial magnetic fields are generated during inflation by considering actions that break the conformal invariance of the electromagnetic field. To break the conformal invariance…
Suppression of scalar power on large scales and associated bispectra
H. V. Ragavendra, Debika Chowdhury, L. Sriramkumar
[Abridged] A sharp cut-off in the primordial scalar power spectrum on large scales has been known to improve the fit to the cosmic microwave background (CMB) data when compared to…