152 citations · 504 across the 9 of their papers we have counts for
6 papers · 1 filter
Photon mass from inflation
Tomislav Prokopec, Ola Tornkvist, Richard Woodard
We consider vacuum polarization from massless scalar electrodynamics in de Sitter inflation. The theory exhibits a 3+1 dimensional analogue of the Schwinger mechanism in which a ph…
Natural Magnetogenesis from Inflation
K. Dimopoulos, T. Prokopec, O. Tornkvist +1
We consider the gravitational generation of the massive Z-boson field of the standard model, due to the natural breaking of its conformal invariance during inflation. The electrowe…
Primordial Spectrum of Gauge Fields from Inflation
Anne-Christine Davis, Konstantinos Dimopoulos, Tomislav Prokopec +1
We show that conformal invariance of gauge fields is naturally broken in inflation, having as a consequence amplification of gauge fields. The resulting spectrum of the field stren…
Cosmic Magnetic Fields from Particle Physics
Ola Tornkvist
I review a number of particle-physics models that lead to the creation of magnetic fields in the early universe and address the complex problem of evolving such primordial magnetic…
Relaxing the Bounds on Primordial Magnetic Seed Fields
Anne-Christine Davis, Matthew Lilley, Ola Tornkvist
We point out that the lower bound on the primordial magnetic field required to seed the galactic dynamo is significantly relaxed in an open universe or in a universe with a positiv…
CP Violating Solitons in the Early Universe
Ola Tornkvist, Antonio Riotto
Solitons in extensions of the Standard Model can serve as localized sources of CP violation. Depending on their stability properties, they may serve either to create or to deplete…