Quantifying the behaviour of curvature perturbations during inflation

Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Revtex4, 10 pages, 9 figures

Scientific paper

How much does the curvature perturbation change after it leaves the horizon, and when should one evaluate the power spectrum? To answer these questions we study single field inflation models numerically, and compare the evolution of different curvature perturbations from horizon crossing to the end of inflation. In particular we calculate the number of efolds it takes for the curvature perturbation at a given wavenumber to settle down to within a given fraction of their value at the end of inflation. We find that e.g. in chaotic inflation, the amplitude of the comoving and the curvature perturbation on uniform density hypersurfaces differ by up to 180 % at horizon crossing assuming the same amplitude at the end of inflation, and that it takes approximately 3 efolds for the curvature perturbation to be within 1 % of its value at the end of inflation.

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

Quantifying the behaviour of curvature perturbations during inflation 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 Quantifying the behaviour of curvature perturbations during inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantifying the behaviour of curvature perturbations during inflation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-17101

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