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Vector field as a quintessence partner | | V.V.Kiselev
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23 Feb 2004 | | Journal: | Class.Quant.Grav. 21 (2004) 3323-3336 | | Subject: | gr-qc astro-ph hep-ph | | Abstract: | We derive generic equations for a vector field driving the evolution of flat homogeneous isotropic universe and give a comparison with a scalar filed dynamics in the cosmology. Two exact solutions are shown as examples, which can serve to describe an inflation and a slow falling down of dynamical ``cosmological constant’’ like it is given by the scalar quintessence. An attractive feature of vector field description is a generation of ``induced mass’’ proportional to a Hubble constant, which results in a dynamical suppression of actual cosmological constant during the evolution. | | Source: | arXiv, gr-qc/0402095 | | Services: | Forum | Review | PDF | Favorites | |
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