Anthropic versus cosmological solutions to the coincidence problem
Journal Article
·
· Physical Review. D, Particles Fields
- Centro de Fisica do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal)
In this paper, we investigate possible solutions to the coincidence problem in flat phantom dark-energy models with a constant dark-energy equation of state and quintessence models with a linear scalar field potential. These models are representative of a broader class of cosmological scenarios in which the universe has a finite lifetime. We show that, in the absence of anthropic constraints, including a prior probability for the models inversely proportional to the total lifetime of the universe excludes models very close to the {Lambda} cold dark matter model. This relates a cosmological solution to the coincidence problem with a dynamical dark-energy component having an equation-of-state parameter not too close to -1 at the present time. We further show that anthropic constraints, if they are sufficiently stringent, may solve the coincidence problem without the need for dynamical dark energy.
- OSTI ID:
- 21502535
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anti-anthropic solutions to the cosmic coincidence problem
Testable solution of the cosmological constant and coincidence problems
Anthropic bound on the cosmological constant
Journal Article
·
Tue Dec 31 23:00:00 EST 2013
· Journal of Cosmology and Astroparticle Physics
·
OSTI ID:22369834
Testable solution of the cosmological constant and coincidence problems
Journal Article
·
Mon Feb 14 23:00:00 EST 2011
· Physical Review. D, Particles Fields
·
OSTI ID:21504966
Anthropic bound on the cosmological constant
Journal Article
·
Sun Nov 29 19:00:00 EST 1987
· Phys. Rev. Lett.; (United States)
·
OSTI ID:5716119