Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-06-26
Phys.Lett. B527 (2002) 9-17
Astronomy and Astrophysics
Astrophysics
v2: published version, two references updated
Scientific paper
10.1016/S0370-2693(01)01522-2
Cosmologies with a time dependent Newton constant and cosmological constant are investigated. The scale dependence of $G$ and $\Lambda$ is governed by a set of renormalization group equations which is coupled to Einstein's equation in a consistent way. The existence of an infrared attractive renormalization group fixed point is postulated, and the cosmological implications of this assumption are explored. It turns out that in the late Universe the vacuum energy density is automatically adjusted so as to equal precisely the matter energy density, and that the deceleration parameter approaches $q = -1/4$. This scenario might explain the data from recent observations of high redshift type Ia Supernovae and the cosmic microwave background radiation without introducing a quintessence field.
Bonanno Alfio
Reuter Martin
No associations
LandOfFree
Cosmology with Self-Adjusting Vacuum Energy Density from a Renormalization Group Fixed Point does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmology with Self-Adjusting Vacuum Energy Density from a Renormalization Group Fixed Point, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmology with Self-Adjusting Vacuum Energy Density from a Renormalization Group Fixed Point will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-641559