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DARK ENERGY VS. DARK MATTER: TOWARDS A UNIFYING SCALAR FIELD?

E. Pecontal, T. Buchert, Y. Copin, P. Di Stefano (eds, Arbey A

Open publisher page 2 citations

Abstract

Abstract. The standard model of cosmology suggests the existence of two components, “dark matter ” and “dark energy”, which determine the fate of the Universe. Their nature is still under investigation, and no direct proof of their existences has emerged yet. There exist alternative models which reinterpret the cosmological observations, for example by replacing the dark energy/dark matter hypothesis by the existence of a unique dark component, the dark fluid, which is able to mimic the behaviour of both components. After a quick review of the cosmological constraints on this unifying dark fluid, we will present a model of dark fluid based on a complex scalar field and discuss the problem of the choice of the potential. 1

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What this paper is about

Abstract. The standard model of cosmology suggests the existence of two components, “dark matter ” and “dark energy”, which determine the fate of the Universe. Their nature is still under investigation, and no direct proof of their existences has emerged yet. There exist alternative models which reinterpret the cosmological observations, for example by replacing the dark energy/dark matter hypothesis by the existence of a unique dark component, the dark fluid, which is able to mimic the behaviour of both components. After a quick review of the cosmological constraints on this unifying dark fluid, we will present a model of dark fluid based on a complex scalar field and discuss the problem of the choice of the potential. 1

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Available abstract

Abstract. The standard model of cosmology suggests the existence of two components, “dark matter ” and “dark energy”, which determine the fate of the Universe. Their nature is still under investigation, and no direct proof of their existences has emerged yet. There exist alternative models which reinterpret the cosmological observations, for example by replacing the dark energy/dark matter hypothesis by the existence of a unique dark component, the dark fluid, which is able to mimic the behaviour of both components. After a quick review of the cosmological constraints on this unifying dark fluid, we will present a model of dark fluid based on a complex scalar field and discuss the problem of the choice of the potential. 1

Key concepts: Dark energy, Physics, Dark fluid, Scalar field dark matter, Dark matter, Scalar field, Lambda-CDM model, Cosmology

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