Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation

Details Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation

2007-10-12

arxiv.org/abs/0710.2385v1

Astronomy and Astrophysics

Astrophysics

28 pages 5 figues

Scientific paper

The effect of the initial condition of inflation on the power spectra of scalar and tensor perturbations is estimated assuming a slow-roll inflation model. By defining a more general initial state in inflation particular properties of the power spectrum such as oscillation can be revealed. The behavior of the power spectrum is shown to exhibit a step-like variation with respect to finite inflation length in cases of both radiation- and scalar matter-dominated pre-inflation. The power spectrum is shown to oscillate in the radiation-dominated case. The effects of such a power spectrum on the TT and TE power spectra are examined for three typical slow-roll inflation models; a small-field model, a large field model, and a hybrid model, considering both pre-inflation models. It is found that the discrepancies between WMAP3 data and the Lambda CDM model, such as suppression of the spectrum at l=2, may be explained to a certain extent by the finite length of inflation for inflation of close to 60 e-folds. The small-field inflation model with scalar matter-dominated pre-inflation provides the best fit to the WMAP3 data among the models considered. Relatively large changes in the angular TT power spectrum occur in response to small changes in inflation length in the radiation-dominated pre-inflation models, and half cases do not fit well with the observed data. This behavior is considered to be attributable to the oscillatory behavior of the power spectrum. The scalar matter-dominated case is thus preferred to the radiation-dominated case of pre-inflation, independent of the length of inflation.

Affiliated with

Also associated with

No associations

Rating

Effect of initial condition of inflation on power and angular power spectra in finite slow-roll 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 Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of initial condition of inflation on power and angular power spectra in finite slow-roll inflation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-402821