Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-07-23
Phys.Lett.B670:246-253,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
18 pages, 8 figures, version to appear in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2008.10.065
The cosmological constant problem is studied in a two component cosmological model. The universe contains a cosmological constant of an arbitrary size and sign and an additional component with an inhomogeneous equation of state. It is shown that, in a proper parameter regime, the expansion of the universe with a large absolute value of the cosmological constant may asymptotically tend to de Sitter space corresponding to a small effective positive cosmological constant. It is argued that such a behavior can be regarded as a solution of the cosmological constant problem in this model. The mechanism behind the relaxation of the cosmological constant is discussed. A connection with modified gravity theories is discussed and an example of a possible realization of the cosmological constant relaxation in f(R) modified gravity is described.
No associations
LandOfFree
The solution of the cosmological constant problem from the inhomogeneous equation of state - a hint from modified gravity? 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 The solution of the cosmological constant problem from the inhomogeneous equation of state - a hint from modified gravity?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The solution of the cosmological constant problem from the inhomogeneous equation of state - a hint from modified gravity? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1182