“School of Physic”
Back to Papers HomeBack to Papers of School of Physic
Paper IPM / Physic / 7606  


Abstract:  
The semiclassical corrections to the CardyVerlinde entropy of a fivedimensional Schwarzschild deSitter black hole (SdS_5) are explicitly evaluated. These corrections are considered within the context of KKW analysis and arise as a result of the selfgravitation effect. In addition, a fourdimensional spacelike brane is considered as the boundary of the SdS_5 bulk background. It is already known that the induced geometry of the brane is exactly given by that of a radiationdominated FRW universe. By exploiting the CFT/FRWcosmology relation, we derive the selfgravitational corrections to the first Friedmannlike 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 selfgravitational corrections act as the source for it. This result is contrary to standard analysis that regards the charge of SdS_5 bulk black hole as the source for stiff matter. Furthermore, we rewrite the Friedmannlike equation in a such way that it represents the conservation equation of energy of a point particle moving in a onedimensional effective potential. The selfgravitational corrections to the effective potential and, consequently, to the point particle's motion are obtained. A short analysis on the asymptotic behavior of the 4dimensional brane is presented.
Download TeX format 

back to top 