A cosmological model with complex scalar field

Details A cosmological model with complex scalar field A cosmological model with complex scalar field

2005-08-17

arxiv.org/abs/gr-qc/0508069v1

Nuovo Cim.B120:1007-1016,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 2 figure

Scientific paper

10.1393/ncb/i2005-10154-8

In this paper, we wish to point out the possibility of using a complex scalar field to account for the inflationary stage and the current acceleration. By the analysis of the dynamical system and numerical work, we show that the amplitude of the complex scalar field plays the role of the inflaton whereas the phase is the quintessence field. The numerical solutions describe heteroclinic orbits, which interpolate between an unstable critical point and a late-time de Sitter attractor. Therefore, this model is more natural to explain the two stages of acceleration.

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