Consequences of U dualities for Intersecting Branes in the Universe

Understand

We consider N -- charge, intersecting brane antibrane configurations in M theory which are smeared uniformly in the common transverse space and may describe our universe.

• We study the consequences of U dualities and find that they imply relations among the scale factors.
• We find using Einstein's equations that U dualities also imply a relation among the density \rho and the pressure p_i for the single charge case.
• We present an ansatz for \rho and p_i for the N -- charge case which yields all the U duality relations among the scale factors.