Towards Singularity- and Ghost-Free Theories of Gravity

TY - JOUR

T1 - Towards Singularity- and Ghost-Free Theories of Gravity

AU - Biswas, T.

AU - Gerwick, E.

AU - Koivisto, T.

AU - Mazumdar, Anupam

PY - 2012/1/19

Y1 - 2012/1/19

N2 - We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of nonlocal actions with improved UV behavior, which nevertheless recover Einstein's general relativity in the IR.

AB - We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of nonlocal actions with improved UV behavior, which nevertheless recover Einstein's general relativity in the IR.

U2 - 10.1103/PhysRevLett.108.031101

DO - 10.1103/PhysRevLett.108.031101

M3 - Journal article

C2 - 22400725

SN - 0031-9007

VL - 108

SP - 031101

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

ER -