Brane cosmology with an anisotropic bulk

  title={Brane cosmology with an anisotropic bulk},
  author={A.Fabbri and D.Langlois and D.A.Steer and R.Zegers},
In the context of brane cosmology, a scenario where our universe is a 3 + 1-dimensional surface (the “brane”) embedded in a five-dimensional spacetime (the “bulk”), we study geometries for which the brane is anisotropic — more specifi-cally Bianchi I — though still homogeneous. We first obtain explicit vacuum bulk solutions with anisotropic three-dimensional spatial slices. The bulk is assumed to be empty but endowed with a negative cosmological constant. We then embed Z 2 symmetric branes in the… 
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