Scale Dependent Spectral Index in Slow Roll Inflation

Details Scale Dependent Spectral Index in Slow Roll Inflation Scale Dependent Spectral Index in Slow Roll Inflation

2001-09-20

arxiv.org/abs/astro-ph/0109354v1

Phys.Rev.D65:101301,2002

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevD.65.101301

Recent observations suggest that the spectral index of the primordial perturbations is very close to unity, as expected in models of slow roll inflation. It is still possible for such models to produce spectra which are scale dependent. We present a formula for the spectrum produced by an arbitrary inflaton potential (within the context of slow roll models); this formula explicitly illustrates and accounts for the possiblity of scale dependence. A class of examples are studied and comparisons made with the standard slow roll formula.

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