Unified dark energydark matter model with inverse quintessence
Abstract
We consider a model where both dark energy and dark matter originate from the coupling of a scalar field with a noncanonical kinetic term to, both, a metric measure and a nonmetric measure. An interacting dark energy/dark matter scenario can be obtained by introducing an additional scalar that can produce non constant vacuum energy and associated variations in dark matter. The phenomenology is most interesting when the kinetic term of the additional scalar field is ghosttype, since in this case the dark energy vanishes in the early universe and then grows with time. This constitutes an ''inverse quintessence scenario'', where the universe starts from a zero vacuum energy density state, instead of approaching it in the future.
 Authors:
 ICRA — International Center for Relativistic Astrophysics, INFN — Istituto Nazionale di Fisica Nucleare, and Dipartimento di Matematica e Informatica, Università degli Studi di Udine, via delle Scienze 206, I33100 Udine (UD) (Italy)
 Department of Physics, BenGurion University of the Negeev, BeerSheva 84105 (Israel)
 Publication Date:
 OSTI Identifier:
 22282889
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 05; Other Information: Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; COUPLING; ENERGY DENSITY; METRICS; NONLUMINOUS MATTER; SCALAR FIELDS; SCALARS; UNIVERSE; VARIATIONS
Citation Formats
Ansoldi, Stefano, and Guendelman, Eduardo I., Email: ansoldi@fulbrightmail.org, Email: guendel@bgu.ac.il. Unified dark energydark matter model with inverse quintessence. United States: N. p., 2013.
Web. doi:10.1088/14757516/2013/05/036.
Ansoldi, Stefano, & Guendelman, Eduardo I., Email: ansoldi@fulbrightmail.org, Email: guendel@bgu.ac.il. Unified dark energydark matter model with inverse quintessence. United States. doi:10.1088/14757516/2013/05/036.
Ansoldi, Stefano, and Guendelman, Eduardo I., Email: ansoldi@fulbrightmail.org, Email: guendel@bgu.ac.il. 2013.
"Unified dark energydark matter model with inverse quintessence". United States.
doi:10.1088/14757516/2013/05/036.
@article{osti_22282889,
title = {Unified dark energydark matter model with inverse quintessence},
author = {Ansoldi, Stefano and Guendelman, Eduardo I., Email: ansoldi@fulbrightmail.org, Email: guendel@bgu.ac.il},
abstractNote = {We consider a model where both dark energy and dark matter originate from the coupling of a scalar field with a noncanonical kinetic term to, both, a metric measure and a nonmetric measure. An interacting dark energy/dark matter scenario can be obtained by introducing an additional scalar that can produce non constant vacuum energy and associated variations in dark matter. The phenomenology is most interesting when the kinetic term of the additional scalar field is ghosttype, since in this case the dark energy vanishes in the early universe and then grows with time. This constitutes an ''inverse quintessence scenario'', where the universe starts from a zero vacuum energy density state, instead of approaching it in the future.},
doi = {10.1088/14757516/2013/05/036},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2013,
place = {United States},
year = 2013,
month = 5
}

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