D-brane worlds and the cosmological constant

Abstract

The cosmological constant on a D-brane is analyzed. This D-brane is in the background produced by the p-brane solutions. The energy-momentum tensor in this model has been found and the form of the cosmological constant has been derived. This energy-momentum tensor is interpreted as an energy-momentum tensor for a perfect fluid on the D-brane. The energy density and the pressure for this fluid have been derived. As it turned out the pressure is negative but the speed of sound is real.

References in corpus (8)

• 4D Gravity on a Brane in 5D Minkowski Space
• Dirichlet-Branes and Ramond-Ramond Charges
• String Solitons
• Gravity on a Brane in Infinite-Volume Extra Space
• D-branes and Short Distances in String Theory
• Basic results in Vacuum Statistics
• A Particle Field Theorist's Lectures on Supersymmetric, Non-Abelian Fluid Mechanics and d-Branes
• p-Brane cosmology and phases of Brans-Dicke theory with matter