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Abstract: We present a model where early inflation and late accelerating expansion ofthe Universe are driven by the real and imaginary parts of a single complexscalar field, which we identified as inflaton and phantom field, respectively.This inflaton-phantom unification is protected by an internal SO1,1 symmetry,with the two cosmological scalars appearing as the degrees of freedom of a solefundamental representation. The unification symmetry allows to build successfulpotentials. We observe that our theory provides a matter-phantom duality, whichtransforms scalar matter cosmological solutions into phantom solutions and viceversa. We also suggest that a complete unification of all scalar fields ofcosmological interest is yet possible under a similar footing.

Author: Abdel Pérez-Lorenzana, Merced Montesinos, Tonatiuh Matos

Source: https://arxiv.org/

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