3 papers
hep-ph2021
Helical magnetic fields from Riemann coupling lead to baryogenesis
Ashu Kushwaha, S. Shankaranarayanan
The spectrum of energy density fluctuations, baryon asymmetry, and coherent large-scale magnetic fields are the three observables that provide crucial information on physics at ver…
gr-qc2020
Helical magnetic fields from Riemann coupling
Ashu Kushwaha, S. Shankaranarayanan
We study the inflationary generation of helical magnetic fields from the Riemann coupling with the electromagnetic field. Most models in the literature introduce non-minimal coupli…
hep-th2019
Galileon scalar electrodynamics
Ashu Kushwaha, S. Shankaranarayanan
We construct a consistent model of Galileon scalar electrodynamics. The model satisfies three essential requirements: (1) The action contains higher-order derivative terms, and obe…