A Varying-α Brane World Cosmology
نویسنده
چکیده
We study the brane world cosmology in the RS2 model where the electric charge varies with time in the manner described by the varying fine-structure constant theory of Bekenstein. We map such varying electric charge cosmology to the dual variablespeed-of-light cosmology by changing system of units. We comment on cosmological implications for such cosmological models.
منابع مشابه
A Varying-e Brane World Cosmology
We study a varying electric charge brane world cosmology in the RS2 model obtained from a varying-speed-of-light brane world cosmology by redefining the system of units. We elaborate conditions under which the flatness problem and the cosmological constant problem can be resolved by such cosmological model.
متن کاملBrane Cosmology, Varying Speed of Light and Inflation in Models with One or More Extra Dimensions *
We summarise the approach to brane cosmology known as " mirage cosmology " and use it to determine the Friedmann equation on a 3-brane embedded in different bulk spacetimes all with one or more extra dimensions. Usually, when there is more than one extra dimension the junction conditions, central to the usual brane world scenarios, are difficult to apply. This problem does not arise in mirage c...
متن کاملInteresting consequences of brane cosmology
We discuss cosmology in four dimensions within the context of a brane-world scenario. Such models can predict chaotic inflation with very low reheat temperature depending on the brane tension. We notice that the gravitino abundance is different in brane-world cosmology and by tuning the brane tension it is possible to get an extremely low abundance. We also study Affleck-Dine baryogenesis in ou...
متن کاملHolographic Cosmic Quintessence on Dilatonic Brane World
Recently quintessence is proposed to explain the observation data of supernova indicating a time-varying cosmological constant and accelerating universe. Inspired by this and its mysterious origin, we look for the possibility of quintessence as the holographic dark matters dominated in the late time in the brane world scenarios. We consider both the cases of static and moving brane in a dilaton...
متن کاملRole of the brane curvature scalar in the brane world cosmology
We include the brane curvature scalar to study its cosmological implication in the brane world cosmology. This term is usually introduced to obtain the well-defined stress-energy tensor on the boundary of anti de Sitter-Schwarzschild space. Here we treat this as the perturbed term for cosmological purpose. It is shown that the brane curvature scalar induces some interesting consequences in the ...
متن کامل