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Old dark energy

Title
Old dark energy
Authors
Cortes M.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2010
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
vol. 81, no. 6
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Dark energy dynamics in the recent universe is influenced by its evolution through the long, matter-dominated expansion history. A particular dynamical property, the flow variable, remains constant in several classes of scalar field models as long as matter dominates; the dark energy is only free to change this behavior at recent times. This gives natural initial conditions for Monte Carlo studies of dark energy dynamics. We propose a parametrization for the later evolution that covers a wide range of possible behaviors, is tractable in making predictions, and can be constrained by observations. We compare the approach to directly parametrizing the potential, which does not take into account the history of the dark energy dynamics. © 2010 The American Physical Society.
DOI
10.1103/PhysRevD.81.063004
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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