Deser, S. and Woodard, R. P.
(2013)
Observational Viability and Stability of Nonlocal Cosmology.
Journal of Cosmology and Astroparticle Physics, 2013
(11).
Art. No. 36.
ISSN 1475-7516.
doi:10.1088/1475-7516/2013/11/036.
https://resolver.caltech.edu/CaltechAUTHORS:20130812-074704800
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Abstract
We show that a class of nonlocal gravity models, proposed to explain current cosmic acceleration without dark energy, passes two major tests: First, they can be defined so as not to alter the, observationally correct, general relativity predictions for gravitationally bound systems. Second, they are stable, ghost-free, with no additional excitations beyond those of general relativity. In this they differ from their, ghostful, localized versions. The systems' initial value constraints are the same as in general relativity, and our nonlocal modifications never convert the original gravitons into ghosts.
| Item Type: | Article |
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| Additional Information: | © 2013 IOP Publishing Ltd. and Sissa Medialab srl.
Received July 25, 2013; Revised October 5, 2013; Accepted October 16, 2013; Published November 14, 2013.
We thank S. Dodelson and S. Park for the persistent questions which have prompted this study. And it is pleasure to acknowledge stimulating conversations with J. Khoury and C. Skordis. This work was partially supported by Department of Energy Grant DE-FG02-16492ER40701, by National Science Foundation grants PHY-1266107 and PHY-1205591, and by the Institute for Fundamental Theory at the University of Florida. |
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| Group: | Caltech Theory |
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| Funders: | | Funding Agency | Grant Number |
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| Department of Energy (DOE) | DE-FG02-16492ER40701 | | NSF | PHY-1266107 | | NSF | PHY-1205591 | | University of Florida | UNSPECIFIED |
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| Subject Keywords: | modified gravity; dark energy theory
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| BRX | TH-6689 | | CALT | 68-2946 | | UFIFT | QG-13-05 |
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| Issue or Number: | 11 |
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| Classification Code: | PACS: 95.36.+x, 04.50.Kd, 11.10.Lm, 98.80.Es, 98.70.Sa, 04.30.-w, 04.50.-h |
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| DOI: | 10.1088/1475-7516/2013/11/036 |
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| Record Number: | CaltechAUTHORS:20130812-074704800 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20130812-074704800 |
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| Official Citation: | Deser, S., & Woodard, R. P. (2013). Observational viability and stability of nonlocal cosmology. Journal of Cosmology and Astroparticle Physics, 2013(11), 036. |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 39852 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Tony Diaz
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| Deposited On: | 12 Aug 2013 22:01 |
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| Last Modified: | 12 Jul 2022 17:37 |
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