Breaking scale invariance from a singular inflaton potential

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1 Scopus citations


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.

Original languageEnglish
Title of host publicationPARTICLES, STRINGS, AND COSMOLOGY
Subtitle of host publication11th International Symposium on Particles, Strings, and Cosmology, PASCOS 2005
Number of pages4
StatePublished - 2 Dec 2005
Event11th International Symposium on Particles, Strings and Cosmology, PASCOS 2005 - Gyeongju, Korea, Republic of
Duration: 30 May 20054 Jun 2005

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference11th International Symposium on Particles, Strings and Cosmology, PASCOS 2005
Country/TerritoryKorea, Republic of


  • Cosmological perturbation theory
  • Inflation


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