A two measure model of dark energy and dark matter

Journal Article · Thu Nov 01 00:00:00 EDT 2012 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2012/11/044· OSTI ID:22279829

Guendelman, Eduardo ^[1]; Singleton, Douglas

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1. Department of Physics, Ben-Gurion University, Beer-Sheva (Israel)

In this work we construct a unified model of dark energy and dark matter. This is done with the following three elements: a gravitating scalar field, φ with a non-conventional kinetic term, as in the string theory tachyon; an arbitrary potential, V(φ); two measures — a metric measure ((−g){sup 1/2}) and a non-metric measure (Φ). The model has two interesting features: (i) For potentials which are unstable and would give rise to tachyonic scalar field, this model can stabilize the scalar field. (ii) The form of the dark energy and dark matter that results from this model is fairly insensitive to the exact form of the scalar field potential.

• OSTI ID: 22279829
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2012, Issue 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
COSMOLOGY
METRICS
NONLUMINOUS MATTER
POTENTIALS
SCALAR FIELDS
STRING MODELS
STRING THEORY
TACHYONS
UNIFIED MODEL