3 papers
astro-ph.CO2026
Suppressed Magnetogenesis from Ultralight Dark Matter due to Finite Conductivity
Ramkishor Sharma, Samarth Majumdar, Divya Sachdeva
Recently, a mechanism for generating astrophysically relevant magnetic fields via ultralight pseudoscalar dark matter, through the coupling term $g_{Ïγ} ÏF_{μν}\tilde{F}^{μν…
astro-ph.CO2025
Lattice simulations of axion-U(1) inflation: gravitational waves, magnetic fields, and scalar statistics
Ramkishor Sharma, Axel Brandenburg, Kandaswamy Subramanian +1
We numerically study axion-U(1) inflation, focusing on the regime where the coupling between axions and gauge fields results in significant backreaction from the amplified gauge fi…
astro-ph.CO2024
Magnetogenesis from axion-SU(2) inflation
Axel Brandenburg, Oksana Iarygina, Evangelos I. Sfakianakis +1
We describe a novel proposal for inflationary magnetogenesis by identifying the non-Abelian sector of Spectator Chromo Natural Inflation (SCNI) with the sector…