78 citations · 93 across the 2 of their papers we have counts for
6 papers
Simulating relic gravitational waves from inflationary magnetogenesis
Axel Brandenburg, Ramkishor Sharma
We present three-dimensional direct numerical simulations of the production of magnetic fields and gravitational waves (GWs) in the early Universe during a low energy scale matter-…
Imprints of the post recombination dissipation of helical magnetic field on the Cosmic Microwave Background Radiation
Sandhya Jagannathan, Ramkishor Sharma, T. R. Seshadri
Astrophysical magnetic fields decay primarily via two processes namely, ambipolar diffusion and turbulence. Constraints on the strength and the spectral index of non-helical magnet…
Gravitational wave generation in a viable scenario of inflationary magnetogenesis
Ramkishor Sharma, Kandaswamy Subramanian, T. R. Seshadri
Generation of magnetic fields during inflation is a promising mechanism for the origin of the observed large scale magnetic fields in the universe. Among several attempts, a popula…
Scalar spectral index in the presence of Primordial Black Holes
Gaveshna Gupta, Ramkishor Sharma, T. R. Seshadri
We study the possibility of reheating the universe in its early stages through the evaporation of Primordial Black Holes (PBHs) that are formed due to the collapse of the inhomogen…
The generation of helical magnetic field in a viable scenario of Inflationary Magnetogenesis
Ramkishor Sharma, Kandaswamy Subramanian, T. R. Seshadri
We study the generation of helical magnetic fields in a model of inflationary magnetogenesis which is free from the strong coupling and back-reaction problems. To generate helical…
Challenges in Inflationary Magnetogenesis: Constraints from Strong Coupling, Backreaction and the Schwinger Effect
Ramkishor Sharma, Sandhya Jagannathan, T. R. Seshadri +1
Models of inflationary magnetogenesis with a coupling to the electromagnetic action of the form , are known to suffer from several problems. These include the str…