Chao-Jian Wu, Cong Ma, Tong-Jie Zhang
We study the likelihood of energy condition violations in the history of the
Universe. Our method is based on a set of functions that characterize energy
condition violation. FLRW cosmological models are built around these
"indication functions". By computing the Fisher matrix of model parameters
using type Ia supernova and Hubble parameter data, we extract the principal
modes of these functions' redshift evolution. These modes allow us to obtain
uncorrelated reconstructions of energy condition violation history. We find
that the data suggest a history of strong energy condition violation, but the
null and dominant energy conditions are likely to be fulfilled.
View original:
http://arxiv.org/abs/1110.4541
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