Friedmann branes with variable tension
Jun, 2008Citations per year
Abstract: (arXiv)
We introduce brane-worlds with non-constant tension, strenghtening the analogy with fluid membranes, which exhibit a temperature-dependence according to the empirical law established by E\'otv\'os. This new degree of freedom allows for evolving gravitational and cosmological constants, the latter being a natural candidate for dark energy. We establish the covariant dynamics on a brane with variable tension in full generality, by considering asymmetrically embedded branes and allowing for non-standard model fields in the 5-dimensional space-time. Then we apply the formalism for a perfect fluid on a Friedmann brane, which is embedded in a 5-dimensional charged Vaidya-Anti de Sitter space-time.- 04.50.Gh
- 04.50.Kd
- 11.25.Uv
- 04.50.-h
- tensor: energy-momentum
- gravitation: fundamental constant
- cosmological constant
- membrane model
- membrane: tension
- fluid
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