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de Sitter Brane Gravity: from Close-Up to Panorama

Maulik K. Parikh·Sergey N. Solodukhin
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Abstract

We find explicitly the induced graviton propagator on de Sitter branes embedded in various five-dimensional spacetimes; de Sitter branes in AdS and Minkowski space are particular cases. By studying the structure of the momentum-space propagator, we are able to extract interesting physics, much of which is qualitatively different from that of flat branes. We find that 1) there can be a set of graviton-like particles which mediate brane gravity at different scales; 2) localized gravity can exist even on de Sitter branes in Minkowski space; 3) Kaluza-Klein modes also contribute to conventional 4-D gravity for de Sitter branes in AdS; and 4) Newton's constant can vary considerably with scale. We comment on the implications for the effective cosmological constant.

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Maulik K. Parikh, Sergey N. Solodukhin. 2001-02-09. de Sitter Brane Gravity: from Close-Up to Panorama. https://doi.org/10.1016/s0370-2693(01)00233-7

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