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Dark Energy with Logarithmic Cosmological Fluid
Seyen Kouwn,오필열 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.6
We propose a dark energy model with a logarithmic cosmological fluid which can result in a verysmall current value of the dark energy density and avoid the coincidence problem without muchfine-tuning. We construct a couple of dynamical models that could realize this dark energy at verylow energy in terms of the quintessence of four scalar fields and discuss the current acceleration ofthe Universe. Numerical values can be made to be consistent with the accelerating Universe byadjusting the two parameters of the theory. The potential can be given only in terms of the scalefactor, but the explicit form at very low energy can be obtained in terms of the scalar field to yieldof the form [수식]. Some discussions and the physical implications of thisapproach are given.