New type scalar fields for cosmic acceleration
نویسندگان
چکیده
منابع مشابه
New Type Scalar Fields for Cosmic Acceleration
We present a model where a non-conventional scalar field may act like dark energy leading to cosmic acceleration. The latter is driven by an appropriate field configuration, which result in an effective cosmological constant. The potential role of such a scalar in the cosmological constant problem is also discussed. ∗e-mail: [email protected] June 2006 During the last years, evidence of an accel...
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Conditions for accelerated expansion of Friedmann–Robertson–Walker space–time are analyzed. Connection of this scenario with present–day observations are reviewed. It is explained how a scalar field could be responsible for cosmic acceleration observed in present times and predicted for the very early Universe. Ideas aimed at answering whether is that the actual case for our Universe are descri...
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The dynamics of cosmic scalar fields with flat potential is studied. Their contribution to the expansion rate of the universe is analyzed, and their behaviour in a simple model of phase transitions is discussed. ∗Work supported by the research program FP52 of the Foundation for Fundamental Research of Matter (FOM). ∗∗e-mail: [email protected] The universe is observed to expand [1], and this ex...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2007
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/68/1/012017