Parametrization of K-essence and Its Kinetic Term

Details Parametrization of K-essence and Its Kinetic Term Parametrization of K-essence and Its Kinetic Term

2005-12-31

arxiv.org/abs/astro-ph/0601007v2

Mod.Phys.Lett.A21:1683-1690,2006

Astronomy and Astrophysics

Astrophysics

8 pages, 1 figure; accepted by Mod. Phys. Lett. A; minor changes to references

Scientific paper

10.1142/S0217732306019475

We construct the non-canonical kinetic term of a k-essence field directly
from the effective equation of state function $w_k(z)$, which describes the
properties of the dark energy. Adopting the usual parametrizations of equation
of state we numerically reproduce the shape of the non-canonical kinetic term
and discuss some features of the constructed form of k-essence.

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