Ghost-free higher derivative unimodular gravity
arXiv:1708.03133 · doi:10.1103/PhysRevD.96.124031
Abstract
The unimodular version of the ghost-free higher derivative gravity is obtained. It is the unimodular reduction of some particular lagrangians quadratic in curvature.
11 pages. LaTeX, some mistakes corrected; reference added. Verdio to be published in PRD