Cosmological scaling solutions for multiple scalar fields
نویسندگان
چکیده
منابع مشابه
Cosmological scaling solutions of non-minimally coupled scalar fields
On one hand recent cosmological observations, and particuarly the Hubble diagram for Type Ia supernovae [1] have led to the idea that the universe may be dominated by a component with negative pressure [2] and thus that today the universe is accelerating. Such a component can also, if one sticks to the prediction of inflation that Ω = 1, account for the “missing energy”. Yet, many candidates ha...
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We examine Friedmann–Robertson–Walker models in three spacetime dimensions. The matter content of the models is composed of a perfect fluid, with a γ-law equation of state, and a homogeneous scalar field minimally coupled to gravity with a self-interacting potential whose energy density red-shifts as a−2ν , where a denotes the scale factor. Cosmological solutions are presented for different ran...
متن کاملA classification of scalar field potentials with cosmological scaling solutions
(1999) A classification of scalar field potentials with cosmological scaling solutions. This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright a...
متن کاملClassification of scalar field potentials with cosmological scaling solutions
An attractive method of obtaining an effective cosmological constant at the present epoch is through the potential energy of a scalar field. Considering models with a perfect fluid and a scalar field, we classify all potentials for which the scalar field energy density scales as a power law of the scale factor when the perfect fluid density dominates. There are three possibilities. The first tw...
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Cosmological brane world solutions are found for five-dimensional bulk spacetimes with a scalar field. A supergravity inspired method for obtaining static solutions is combined with a method for finding brane cosmologies with constant bulk energies. This provides a way to generate full (bulk and brane) cosmological solutions to brane worlds with bulk scalar fields. Examples of these solutions, ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2014
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.90.023516