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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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
Departments: Faculty of Science and Technology > Physics
ID Code: 55943
Deposited By: ep_importer_pure
Deposited On: 19 Jul 2012 15:39
Refereed?: Yes
Published?: Published
Last Modified: 19 Feb 2020 01:41

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