Ghost-free braneworld bigravity
高能物理 - 理论
2009-11-10 v3 天体物理学
高能物理 - 唯象学
摘要
We consider a generalisation of the DGP model, by adding a second brane with localised curvature, and allowing for a bulk cosmological constant and brane tensions. We study radion and graviton fluctuations in detail, enabling us to check for ghosts and tachyons. By tuning our parameters accordingly, we find bigravity models that are free from ghosts and tachyons. These models will lead to large distance modifications of gravity that could be observable in the near future.
引用
@article{arxiv.hep-th/0402079,
title = {Ghost-free braneworld bigravity},
author = {Antonio Padilla},
journal= {arXiv preprint arXiv:hep-th/0402079},
year = {2009}
}
备注
Dedicated to the memory of Ian Kogan. Version to appear in Classical and Quantum Gravity