Computation of inflationary cosmological perturbations in chaotic inflationary scenarios using the phase-integral method
2009
The phase-integral approximation devised by Fr\"oman and Fr\"oman is used for computing cosmological perturbations in the quadratic chaotic inflationary model. The phase-integral formulas for the scalar and tensor power spectra are explicitly obtained up to fifth order of the phase-integral approximation. We show that the phase integral gives a very good approximation for the shape of the power spectra associated with scalar and tensor perturbations as well as the spectral indices. We find that the accuracy of the phase-integral approximation compares favorably with the numerical results and those obtained using the slow-roll and uniform-approximation methods.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
34
References
7
Citations
NaN
KQI