We consider a rather simple method for the description of the big bang-big crunch cosmological singularity crossing. For the flat Friedmann universe this method gives the same results as more complicated methods, usingWeyl symmetry or the transitions between the Jordan and Einstein frames. It is then easily generalized for the case of a Bianchi-I anisotropic universe. We also present early-time and latetime asymptotic solutions for a Bianchi-I universe, filled with a conformally coupled massless scalar field.
Bianchi-I cosmological model and crossing singularities / Kamenchtchik, A.; Pozdeeva, E.; Tronconi, A.; Venturi, G.; Vernov, S.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - STAMPA. - 95:(2017), pp. 083503.1-083503.11. [10.1103/PhysRevD.95.083503]
Bianchi-I cosmological model and crossing singularities
KAMENCHTCHIK, ALEXANDR;TRONCONI, ALESSANDRO;VENTURI, GIOVANNI;
2017
Abstract
We consider a rather simple method for the description of the big bang-big crunch cosmological singularity crossing. For the flat Friedmann universe this method gives the same results as more complicated methods, usingWeyl symmetry or the transitions between the Jordan and Einstein frames. It is then easily generalized for the case of a Bianchi-I anisotropic universe. We also present early-time and latetime asymptotic solutions for a Bianchi-I universe, filled with a conformally coupled massless scalar field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
