A new single-dynamical-scalar-field model of dark energy

Abstract

A new single-dynamical-scalar-field model of dark energy is proposed, in which either higher derivative terms nor structures of extra dimension are needed. With the help of a fixed background vector field, the parameter for the effective equation of state of dark energy may cross $w=-1$ in the evolution of the universe. After suitable choice of the potential, the crossing $w=-1$ and transition from decelerating to accelerating occur at $z\approx 0.2$ and $z\approx 1.7$, respectively.

arXiv comment7 pages, 4 figures

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Cited by in corpus (1)

• Crossing the phantom divide with a classical Dirac field