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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
    Subjects: ?? qc ??
    Departments: Faculty of Science and Technology > Physics
    ID Code: 55943
    Deposited By: ep_importer_pure
    Deposited On: 19 Jul 2012 16:39
    Refereed?: Yes
    Published?: Published
    Last Modified: 26 May 2018 00:21
    Identification Number:

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