Cosmological perturbations in singularity-free, deflationary models

Details Cosmological perturbations in singularity-free, deflationary models Cosmological perturbations in singularity-free, deflationary models

1998-05-13

arxiv.org/abs/gr-qc/9805048v1

Nuovo Cim.B114:93-104,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, Latex, sub. to Class. Quant. Grav

Scientific paper

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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