De Sitter ground state of scalar-tensor gravity and its fluctuation with dust

Details De Sitter ground state of scalar-tensor gravity and its fluctuation with dust De Sitter ground state of scalar-tensor gravity and its fluctuation with dust

2010-06-21

arxiv.org/abs/1006.3979v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, 9figs

Scientific paper

An exact de Sitter solution of scalar-tensor gravity is found, in which the non-minimal coupling scalar is rolling along a non-constant potential. Based on this solution, a dust-filled FRW universe is explored in frame of scalar-tensor gravity. The effective dark energy induced by the sole non-minimal scalar can be quintessence-like, phantom-like, and more significantly, can cross the phantom divide. The rich and varied properties of scalar-tensor gravity even with only one scalar is shown in this article.

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