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Probing the creatable character of some significant universe models

Published online by Cambridge University Press:  30 September 2008

A. Oscoz ,
E. Mediavilla ,
M. Serra-Ricart ,
R. Lapiedra  and
D. Sáez
R. Lapiedra
Affiliation:
Departament D'Astronomia i Astrofísica, Universitat de València, 46100-Burjassot, València, Spain
D. Sáez
Affiliation:
Departament D'Astronomia i Astrofísica, Universitat de València, 46100-Burjassot, València, Spain
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Abstract

An unambiguous physical definition of creatable universes was recently proposed. According to it, flat and closed Friedmann-Robertson-Walker (FRW) backgrounds can be created as quantum vacuum fluctuations, whereas open backgrounds are not creatable. Here, physically motivated perturbations of closed and flat backgrounds are analyzed. Various creatable perturbed FRW universes are thus found. Some of them involve scalar and tensor perturbations with appropriate spectra, whereas other ones are Bianchi models.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 30: Spanish Relativity Meeting - Encuentros Relativistas Españoles , ERE2007: Relativistic Astrophysics and Cosmology , 2008 , pp. 303 - 306
Copyright
© EAS, EDP Sciences, 2008

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References

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