In this paper, we consider a model of inflationary cosmology with inflation preceded by a bounce and study its primordial curvature perturbations. Our model gives rise to a primordial power spectrum with a feature of oscillation on large scales compared with the nearly scale-invariant spectrum generated by the traditional slow-rolling inflation model. This effect changes the cosmic microwave background temperature power spectrum and the large scale structure matter power spectrum. Further, with a detailed simulation we will show that in some detailed models this signal might be detectable in forthcoming observations, such as PLANCK and LAMOST.

• Received 11 August 2008

DOI:https://doi.org/10.1103/PhysRevD.79.021303