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Instabilities in tensorial nonlocal gravity
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0002-9403-8565
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2017 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 95, no 4, 043539Article in journal (Refereed) Published
Abstract [en]

We discuss the cosmological implications of nonlocal modifications of general relativity containing tensorial structures. Assuming the presence of standard radiation-and matter-dominated eras, we show that, except in very particular cases, the nonlocal terms contribute a rapidly growing energy density. These models therefore generically do not have a stable cosmological evolution.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 95, no 4, 043539
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Physical Sciences
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URN: urn:nbn:se:kth:diva-205058DOI: 10.1103/PhysRevD.95.043539ISI: 000396025800005OAI: oai:DiVA.org:kth-205058DiVA: diva2:1115594
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QC 20170627

Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2017-06-27Bibliographically approved

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Koivisto, Tomi S.
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