Towards singularity and ghost free theories of gravity

Biswas, Tirthabir and Gerwick, Erik and Koivisto, Tomi and Mazumdar, Anupam (2012) Towards singularity and ghost free theories of gravity. Physical review letters, 108 (3). ISSN 1079-7114

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
4 pages; redundancies in action eliminated; references added and a few minor typos corrected © 2012 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
55943
Deposited By:
Deposited On:
19 Jul 2012 15:39
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Dec 2020 01:39