COUPLED QUINTESSENCE AND THE COINCIDENCE PROBLEM
G. MANGANODipartimento di Fisica, Universitá di Napoli "Federico II", and INFN, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Naples, ItalyG. MIELEDipartimento di Fisica, Universitá di Napoli "Federico II", and INFN, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Naples, ItalyV. PETTORINODipartimento di Fisica, Universitá di Napoli "Federico II", and INFN, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Naples, Italy
2003en
ABI
Abstract
We consider a model of interacting cosmological constant/quintessence, where dark matter and dark energy behave as, respectively, two coexisting phases of a fluid, a thermally excited Bose component and a condensate, respectively. In a simple phenomenological model for the dark components interaction we find that their energy density evolution is strongly coupled during the universe evolution. This feature provides a possible way out for the coincidence problem affecting many quintessence models.
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Cited by 20 references