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Title: Dark energy equation of state and anthropic selection
Author: Garriga Torres, Jaume
Linde, A. D.
Vilenkin, A. (Alexander)
Keywords: Energia fosca (Astronomia)
Equacions d'estat
Principi antròpic
Dark energy (Astronomy)
Anthropic principle
Equations of state
Issue Date: 2004
Publisher: The American Physical Society
Abstract: We explore the possibility that the dark energy is due to a potential of a scalar field and that the magnitude and the slope of this potential in our part of the Universe are largely determined by anthropic selection effects. We find that, in some models, the most probable values of the slope are very small, implying that the dark energy density stays constant to very high accuracy throughout cosmological evolution. In other models, however, the most probable values of the slope are such that the slow roll condition is only marginally satisfied, leading to a recollapse of the local universe on a time scale comparable to the lifetime of the Sun. In the latter case, the effective equation of state varies appreciably with the redshift, leading to a number of testable predictions.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review D, 2004, vol. 69, num. 6, p. 063521-1-063521-12
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ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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