4.7 Article

Instabilities in tensorial nonlocal gravity

Journal

PHYSICAL REVIEW D
Volume 95, Issue 4, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.95.043539

Keywords

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Funding

  1. DFG [TRR33]
  2. DAAD through the program Forschungsstipendium fur Doktoranden und Nachwuchswissenschaftler''
  3. Netherlands Organization for Scientific Research/Dutch Ministry of Education, Culture and Science (NWO/OCW)
  4. D-ITP consortium, a program of the NWO - OCW
  5. University of Pennsylvania

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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.

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