Consistent Spin-Two Coupling and Quadratic Gravitation
摘要
A discussion of the field content of quadratic higher-derivative gravitation is presented, together with a new example of a massless spin-two field consistently coupled to gravity. The full quadratic gravity theory is shown to be equivalent to a canonical second-order theory of a massive scalar field, a massive spin-two symmetric tensor field and gravity. The conditions showing that the tensor field describes only spin-two degrees of freedom are derived. A limit of the second-order theory provides a new example of massless spin-two field consistently coupled to gravity. A restricted set of vacua of the second-order theory is also discussed. It is shown that flat-space is the only stable vacuum of this type, and that the spin-two field around flat space is unfortunately always ghost-like.
引用
@article{arxiv.hep-th/9509142,
title = {Consistent Spin-Two Coupling and Quadratic Gravitation},
author = {Ahmed Hindawi and Burt A. Ovrut and Daniel Waldram},
journal= {arXiv preprint arXiv:hep-th/9509142},
year = {2011}
}
备注
28 pages, LaTeX2e with AMS-LaTeX 1.2, epsfig, and rangecite macros, 3 eps figures