One of the interesting aspects of the Randall-Sundrum model is the fact that the Friedmann equations contain terms proportionnal to the square of the energy density. This contrasts with standard cosmology where the relationship between H² and rho is strictly linear. Although deriving the rho² terms is relatively straightforward in the RS-2 model, the same cannot be said for RS-1, where the presence of a second brane complicates matters. In this talk, I will present results of recent work (hep-th/0201041) where we have used a perturbative approach to derive these second order terms in the RS-1 model.

Tuesday, February 19th 2002, 13:10
Ernest Rutherford Physics Building, room 326