The Phase Transition of Dark Energy

Details The Phase Transition of Dark Energy The Phase Transition of Dark Energy

2006-12-05

arxiv.org/abs/astro-ph/0612113v1

Astronomy and Astrophysics

Astrophysics

3 pages, no figure

Scientific paper

Considering that the universe is filled with the nonrelativistic matter and dark energy and each component is respectively satisfied with its conservation condition in the absence of their interaction, we give the change rate of the fractional density and the density of dark energy from the conservation condition. It is clear that the fractional density of dark energy will monotonously increase and gradually become the dominating contribution to the universe as the redshift becomes low. Combining the evolutional trend of the state equation of dark energy and the change rate of the density of dark energy we find that the density of dark energy will decrease up to a minimum and whereafter it will increase again as the redshift becomes low. This can be regarded as the phase transition of dark energy from the quintessence phase to the phantom phase.

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