We set up a formalism that can be used to calculate the power spectrum of the curvature perturbations produced during inflation up to arbitrary order in the slow-roll expansion, and explicitly calculate the power spectrum and spectral index up to second-order corrections.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 21 Jun 2001|
Bibliographical noteFunding Information:
We thank Jai-chan Hwang for encouraging us to complete and publish this work, and Jai-chan Hwang, Kiwoon Choi and Pyungwon Ko for helpful comments. This work was supported in part by Brain Korea 21 and KRF grant 2000-015-DP0080.