A Model of the Universe including dark Energy
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In this work we explore a model of the universe in which dark energy is modelled explicitely with both a dynamical quintessence field (with a double exponential self-interaction potential) and a cosmological constant. For a given region of the parameter space, our results confirm the possibility of a collapsing universe, which is necessary for an adequate definition of both perturbative quantum field and string theories. We have also reproduced the measurements of modulus distance from supernovae with good accuracy.
11 pages, 4 ps figures. Based, largely, in the talk presented by R Cardenas in the IX Simposium of the Cuban Physical Society, Havana, April, 2002
11 pages, 4 ps figures. Based, largely, in the talk presented by R Cardenas in the IX Simposium of the Cuban Physical Society, Havana, April, 2002