Preheating - cosmic magnetic dynamo ?

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

14 pages, 7 eps, 1 jpg figures. New discussion and simulations of the interplay between resonance and growth of conductivity

Scientific paper

10.1103/PhysRevD.63.103515

We study the amplification of large-scale magnetic fields during preheating and inflation in several different models. Preheating can resonantly amplify seed fields on cosmological scales. In the presence of conductivity, however, the effect of resonance is typically weakened while the amplitude of produced magnetic fields depends sensitively on the evolution of the conductivity during the preheating and thermalisation phases. In addition we discuss geometric magnetisation, where amplification of magnetic fields occurs through coupling to curvature invariants. This can be efficient during inflation due to a negative coupling instability. Finally we discuss the breaking of the conformal flatness of the background metric whereby magnetic fields can be stimulated through the growth of scalar metric perturbations during metric preheating.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Preheating - cosmic magnetic dynamo ? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Preheating - cosmic magnetic dynamo ?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preheating - cosmic magnetic dynamo ? will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-445836

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.