The Fate of the Universe: Dark Energy Dilution?

Abstract

We study the possibility that dark energy decays in the future and the universe stops accelerating. The fact thatthe cosmological observations prefer an equation of state of dark energy smaller than -1 can be a signal that dark energy will decay in the future. This conclusion is based in interpreting a w<-1 as a signal of dark energy interaction with another fluid. We determine the interaction through the cosmological data and extrapolate it into the future. The resulting energy density for dark energy becomes rho=a^{-3(1+w)}e^{-β(a-1)}, i.e. it has an exponential suppression for a >> a_o=1. In this scenario the universe ends up dominated by this other fluid, which could be matter, and the universe stops accelerating at some time in the near future.

arXiv comment5 pages, 3 figures

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Cited by in corpus (5)

• Interacting new generalized Chaplygin gas
• Interacting dark energy: generic cosmological evolution for two scalar fields
• Cosmic acceleration from interaction of ordinary fluids
• Cosmology and Quantum Field Theory II: Study of an extended Nambu-Jona-Lasinio model with a Dynamical Coupling
• Cosmology and Quantum Field Theory: A study of the Nambu-Jona-Lasinio Model