Authors: | Dimitrijevic, I. Dragovich, B. Koshelev, A. S. Rakic, Z. Stankovic, J. |
Title: | Cosmological solutions of a nonlocal square root gravity | Journal: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Volume: | 797 | Issue Date: | 10-Oct-2019 | ISSN: | 03702693 | DOI: | 10.1016/j.physletb.2019.134848 | URL: | https://api.elsevier.com/content/abstract/scopus_id/85070591496 | Abstract: | © 2019 The Authors In this paper we consider modification of general relativity extending R−2Λ by nonlocal term of the form R−2ΛF(□)R−2Λ, where F(□) is an analytic function of the d'Alembert operator □. We have found some exact cosmological solutions of the corresponding equations of motion without matter and with Λ≠0. One of these solutions is a(t)=At [Formula presented] e [Formula presented] t2, which imitates properties similar to an interplay of the dark matter and the dark energy. For this solution we calculated some cosmological parameters which are in a good agreement with observations. This nonlocal gravity model has not the Minkowski space solution. We also found several conditions which function F(□) has to satisfy. |
Show full item record
SCOPUSTM
Citations
18
checked on Oct 5, 2024
Page view(s)
8
checked on Oct 5, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.