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Cosmological perturbations in singularity-free, deflationary models

Authors
  • Capozziello, S.
  • Lambiase, G.
  • Scarpetta, G.
Type
Published Article
Publication Date
May 13, 1998
Submission Date
May 13, 1998
Identifiers
arXiv ID: gr-qc/9805048
Source
arXiv
License
Unknown
External links

Abstract

We consider scalar perturbations of energy-density for a class of cosmological models where an early phase of accelerated expansion evolves, without any fine-tuning for graceful exit, towards the standard Friedman eras of observed universe. The quantum geometric procedure which generates such models agrees with results for string cosmology since it works if dynamics is dominated by a primordial fluid of extended massive objects. The main result is that characteristic scales of cosmological interest, connected with the extension of such early objects, are selected.

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