Yu-Xiao Liu, Yong-Qiang Wang, Shao-Feng Wu, Yuan Zhong
Recently, H. Lu and C.N Pope et al proposed critical gravities
(quadratic-curvature actions with cosmological constant) in four and higher
dimensions. At the critical point, these theories possess such an AdS vacuum,
for which there is only massless tensor, and the linearized excitations have
vanishing energy. In this paper we construct analytic braneworld solutions in
critical gravities with matter in diverse dimensions. Both thin and thick
branes with co-dimension one are considered. It is found that at the critical
point the equations of motion (EOMs) are second-order, and the thin and thick
brane solutions are obtained. The curvature-squared modifications in the
four-dimensional critical gravity do not affect the brane solutions, but they
will do in higher dimensions. All these branes are embedded in
higher-dimensional AdS spacetimes.
View original:
http://arxiv.org/abs/1201.5922
No comments:
Post a Comment