Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-08-24
Phys.Rev.D73:064019,2006
Physics
High Energy Physics
High Energy Physics - Theory
24 pages, 2 figures
Scientific paper
10.1103/PhysRevD.73.064019
Vacuum expectation value of the energy-momentum tensor and the vacuum interaction forces are evaluated for a massive scalar field with general curvature coupling parameter satisfying Robin boundary conditions on two codimension one parallel branes embedded in background spacetime $AdS_{D_1+1}\times \Sigma $ with a warped internal space $\Sigma $. The vacuum energy-momentum tensor is presented as a sum of boundary-free, single brane induced, and interference parts. The latter is finite everywhere including the points on the branes and is exponentially small for large interbrane distances. Unlike to the purely AdS bulk, the part induced by a single brane, in addition to the distance from the brane, depends also on the position of the brane in the bulk. The asymptotic behavior of this part is investigated for the points near the brane and for the position of the brane close to the AdS horizon and AdS boundary. The vacuum forces acting on the branes are presented as a sum of the self-action and interaction terms. The interaction forces between the branes are finite for all nonzero interbrane distances and are investigated as functions of the brane positions and the length scale of the internal space. As an example the case $\Sigma =S^{D_2}$ is considered. An application to the higher dimensional generalization of the Randall-Sundrum brane model with arbitrary mass terms on the branes is discussed.
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