1210.7733 (Minjoon Park et al.)

Massive Gravity from Higher Derivative Gravity with Boundary Conditions    [PDF]

Minjoon Park, Lorenzo Sorbo

With an appropriate choice of parameters, a higher derivative theory of gravity can describe a normal massive sector and a ghost massless sector. We show that, when defined on an asymptotically de Sitter spacetime with Dirichlet boundary conditions, such a higher derivative gravity can provide a framework for a unitary theory of massive gravity in four spacetime dimensions. The resulting theory is free not only of higher derivative ghosts but also of the Boulware-Deser mode.

View original: http://arxiv.org/abs/1210.7733