Rights statement: © 2012 American Physical Society
Final published version, 103 KB, PDF document
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Towards singularity and ghost free theories of gravity
AU - Biswas, Tirthabir
AU - Gerwick, Erik
AU - Koivisto, Tomi
AU - Mazumdar, Anupam
N1 - 4 pages; redundancies in action eliminated; references added and a few minor typos corrected © 2012 American Physical Society
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 non-local 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 non-local 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
VL - 108
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 3
M1 - 031101
ER -