Scalar Field Oscillations Contributing to Dark Energy

Details Scalar Field Oscillations Contributing to Dark Energy Scalar Field Oscillations Contributing to Dark Energy

2005-01-18

arxiv.org/abs/astro-ph/0501381v2

Phys.Rev. D72 (2005) 084007

Astronomy and Astrophysics

Astrophysics

17 pages, 6 figures, Latex file. Sec.II reduced, discussion on sound speed added in Sec.IV, new references added. Accepted for

Scientific paper

10.1103/PhysRevD.72.084007

We use action-angle variables to describe the basic physics of coherent scalar field oscillations in the expanding universe. These analytical mechanics methods have some advantages, like the identification of adiabatic invariants. As an application, we show some instances of potentials leading to equations of state with $p<-\rho/3$, thus contributing to the dark energy that causes the observed acceleration of the universe.

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