Breaking scale invariance from a singular inflaton potential

Details Breaking scale invariance from a singular inflaton potential Breaking scale invariance from a singular inflaton potential

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..805..451g&link_type=abstract

PARTICLES, STRINGS, AND COSMOLOGY: 11th International Symposium on Particles, Strings, and Cosmology; PASCOS 2005. AIP Conferen

Physics

2

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We break the scale invariance of the primordial power spectrum of curvature perturbations of inflation. Introducing a singular behaviour due to e.g. spontaneous symmetry breaking in the inflaton potential, we obtain fully analytic expressions of scale dependent oscillation and a modulation in power on small scale in the primordial spectrum. And we move to the associated cosmic microwave background and matter power spectra which we can observe now and discuss the signature of the scale dependence. We also address the possibility of whether some inflationary model with featured potential might mimic the predictions of the scale invariant power spectrum. We present an example which illustrate such degeneracies.

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