Parametrization of K-essence and Its Kinetic Term
Hui Li, Zong-Kuan Guo, Yuan-Zhong Zhang
Abstract
We construct the non-canonical kinetic term of a k-essence field directly from the effective equation of state function wk(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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