Open AccessGhost Dark Energy Model with Non-linear Interaction
Author(s) -
Sistemas Revistas,
Alexander Oliveros García
Publication year - 2018
Publication title -
revista de ciencias (on line)/revista de ciencias
Language(s) - English
Resource type - Journals
eISSN - 2248-4000
pISSN - 0121-1935
DOI - 10.25100/rc.v20i1.6048
Subject(s) - dark energy , hubble's law , physics , deceleration parameter , friedmann–lemaître–robertson–walker metric , equation of state , constant (computer programming) , square (algebra) , coupling parameter , work (physics) , metric expansion of space , dark matter , universe , astrophysics , quantum mechanics , cosmology , mathematics , geometry , computer science , programming language
In this paper we study a dark energy model taking into account a non-linear interaction between the dark energy and dark matter components. The non-linear interaction term, used in this work, is proportional to the square of dark energy density. Considering a FRW type at universe, we obtain an analytical expression for the Hubble parameter H and from this quantity, the deceleration parameter q and the equation of state parameter w Λ are analyzed. We found that, in this scenario, the accelerated expansion regime of the universe in late times is possible. However, using suitable values for the coupling constant, the square of the speed of sound remains negative, therefore, the model is unstable under small perturbations.