4-5 December 2018
Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine
Europe/Kiev timezone

Reconstructed potentials of the 2-field model of dark energy with canonical and non-canonical kinetic terms

4 Dec 2018, 15:00
Oral Astrophysics and Cosmology Astrophysics and Cosmology


Olga Sergijenko (Taras Shevchenko National University of Kyiv)


We generalize quintom to include the tachyonic kinetic term along with the classical one. For the spatially flat, homogeneous and isotropic Universe with Friedmann-Robertson-Walker metric of 4-space we discuss in detail the reconstruction of the scalar fields potential $U(\phi,\xi)$. Such a reconstruction cannot be done unambiguously, so we consider 3 simplest forms of $U(\phi,\xi)$: the product of $\Phi(\phi)$ and $\Xi(\xi)$, the sum of $\Phi(\phi)$ and $\Xi(\xi)$ and this sum to the $\kappa$th power. We present the maps of reconstructed potentials for the Chevallier-Polarski-Linder parametrization of the equation of state parameter and the set of cosmological parameters obtained from the latest Planck data.

Primary author

Olga Sergijenko (Taras Shevchenko National University of Kyiv)

Presentation Materials

There are no materials yet.