Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-07-11
Phys.Rev.D77:063507,2008
Astronomy and Astrophysics
Astrophysics
Title slightly changed to match published version. Typos corrected and references added. Five pages, no figures
Scientific paper
10.1103/PhysRevD.77.063507
We present a model where early inflation and late accelerating expansion of the Universe are driven by the real and imaginary parts of a single complex scalar field, which we identified as inflaton and phantom field, respectively. This inflaton-phantom unification is protected by an internal SO(1,1) symmetry, with the two cosmological scalars appearing as the degrees of freedom of a sole fundamental representation. The unification symmetry allows to build successful potentials. We observe that our theory provides a matter-phantom duality, which transforms scalar matter cosmological solutions into phantom solutions and vice versa. We also suggest that a complete unification of all scalar fields of cosmological interest is yet possible under a similar footing.
Matos Tonatiuh
Montesinos Merced
Pérez--Lorenzana Abdel
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