Canonical and phantom scalar fields as an interaction of two perfect fluids
arXiv:1301.3311 · doi:10.1007/s10509-012-1346-5
Abstract
In this article we investigate and develop specific aspects of Friedmann-Robertson-Walker (FRW) scalar field cosmologies related to the interpretation that canonical and phantom scalar field sources may be interpreted as cosmological configurations with a mixture of two interacting barotropic perfect fluids: a matter component with a stiff equation of state (), and an "effective vacuum energy" with a cosmological constant equation of state (). An important characteristic of this alternative equivalent formulation in the framework of interacting cosmologies is that it gives, by choosing a suitable form of the interacting term , an approach for obtaining exact and numerical solutions. The choice of merely determines a specific scalar field with its potential, thus allowing to generate closed, open and flat FRW scalar field cosmologies.
9 pages, accepted for publication in Astrophys Space Sci
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