Emergent Gravity from a Mass Deformation in Warped Spacetime

Details Emergent Gravity from a Mass Deformation in Warped Spacetime Emergent Gravity from a Mass Deformation in Warped Spacetime

2005-07-25

arxiv.org/abs/hep-th/0507245v1

Phys.Rev. D72 (2005) 104003

Physics

High Energy Physics

High Energy Physics - Theory

44 pages, 3 figures

Scientific paper

We consider a deformation of five-dimensional warped gravity with bulk and boundary mass terms to quadratic order in the action. We show that massless zero modes occur for special choices of the masses. The tensor zero mode is a smooth deformation of the Randall-Sundrum graviton wavefunction and can be localized anywhere in the bulk. There is also a vector zero mode with similar localization properties, which is decoupled from conserved sources at tree level. Interestingly, there are no scalar modes, and the model is ghost-free at the linearized level. When the tensor zero mode is localized near the IR brane, the dual interpretation is a composite graviton describing an emergent (induced) theory of gravity at the IR scale. In this case Newton's law of gravity changes to a new power law below the millimeter scale, with an exponent that can even be irrational.

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