Crossing the phantom divide without phantom matter

L. Chimento, R. Lazkoz, Roy Maartens, I. Quiros

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Abstract

A class of braneworld models can lead to phantom-like acceleration of the late universe, but without the need for any phantom matter. In the simplest models, the universe contains only cold dark matter and a cosmological constant. We generalize these models by introducing a quintessence field. The new feature in our models is that quintessence leads to a crossing of the phantom divide, w = −1. This is a purely gravitational effect, and there is no phantom instability. Furthermore, the Hubble parameter is always decreasing, and there is no big rip singularity in the future
Original languageEnglish
Pages (from-to)004-004
Number of pages1
JournalJournal of Cosmology and Astroparticle Physics
Volume2006
Issue number09
DOIs
Publication statusPublished - 2006

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