Non-conventional cosmology from a brane universe
نویسندگان
چکیده
منابع مشابه
Non-conventional cosmology from a brane-universe
We consider “brane-universes”, where matter is confined to four-dimensional hypersurfaces (three-branes) whereas one extra compact dimension is felt by gravity only. We show that the cosmology of such branes is definitely different from standard cosmology and identify the reasons behind this difference. We give a new class of exact solutions with a constant five-dimensional radius and cosmologi...
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The purpose of this contribution is to present a new approach to extra-dimensions, the “braneworld” scenario, where ordinary matter is trapped in a three-dimensional surface, called ‘brane’, embedded in a higher dimensional space. This idea must be contrasted with the traditional Kaluza-Klein treatment of extra dimensions, where matter fields live everywhere in compact extra dimensions and can ...
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Brane cosmology takes the unconventional form H ∼ √ρ. To recover the standard cosmology, we have to assume that the matter density is much less than the brane tension. We show that the assumption can be justified even near the end of inflation if we fine-tune the coupling constant of the inflaton potential. As a consequence, the standard cosmology is recovered after inflation. PACS: 98.80-k; 04...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2000
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(99)00696-3