Bouncing Cosmologies and Self-Gravitational Corrections

A four-dimensional timelike brane is considered as the boundary of the $SAd{S}_5$ bulk background. Exploiting the CFT/FRW-cosmology relation, we derive the self-gravitational corrections to the first Friedmann-like equation which is the equation of the brane motion. The additional term that arises due to the semiclassical analysis, can be viewed as stiff matter where the self-gravitational corrections act as the source for it. This result is contrary to standard analysis that regards the charge of $SAd{S}_5$ bulk black hole as the source for stiff matter. A very interesting feature of the solutions of FRW equation is that they all (for $k=0,\pm 1$) have a non-vanishing minimum value for the scale factor.