309 citations · 2.5k across the 104 of their papers we have counts for
12 papers · 1 filter
Observational constraints and predictions of the interacting dark sector with field-fluid mapping
Joseph P Johnson, Archana Sangwan, S. Shankaranarayanan
We consider an interacting field theory model that describes the dark energy - dark matter interaction. Only for a specific interaction term, this interacting field theory descript…
Detectability of nGauss primordial magnetic fields in the B-mode polarization of CMB
Archana Sangwan, S. Shankaranarayanan
The origin of large-scale magnetic fields in the Universe is still unknown. Observations suggest the presence of nGauss primordial magnetic fields at the last scattering surface. T…
Low-energy modified gravity signatures on the large-scale structures
Joseph P Johnson, S. Shankaranarayanan
A large number of dark energy and modified gravity models lead to the same expansion history of the Universe, hence, making it difficult to distinguish them from observations. To m…
Vector Galileon and inflationary magnetogenesis
Debottam Nandi, S. Shankaranarayanan
Cosmological inflation provides the initial conditions for the structure formation. However, the origin of large-scale magnetic fields cannot be addressed in this framework. The ke…
Low Scale Higgs Inflation with Gauss-Bonnet Coupling
Jose Mathew, S. Shankaranarayanan
Recent LHC data provides precise values of coupling constants of the Higgs field, however, these measurements do not determine its coupling with gravity. We explore this freedom to…
Primordial magnetogenesis before recombination
Ophélia Fabre, S. Shankaranarayanan
The origin of large magnetic fields in the Universe remains currently unknown. We investigate here a mechanism before recombination based on known physics. The source of the vortic…