Cosmology of f ( R , ❑ R ) gravity

Using dynamical system analysis, we explore the cosmology of theories of order up to eighth order of the form f(R,❑R). The phase space of these cosmologies reveals that higher-order terms can have a dramatic influence on the evolution of the cosmology, avoiding the onset of finite time singularities...

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Bibliographic Details
Published in:Physical review. D 2019-05, Vol.99 (10), p.104001, Article 104001
Main Authors: Carloni, Sante, Rosa, João Luís, Lemos, José P. S.
Format: Article
Language:English
Subjects:
Cosmology
Singularities
Systems analysis
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Summary:Using dynamical system analysis, we explore the cosmology of theories of order up to eighth order of the form f(R,❑R). The phase space of these cosmologies reveals that higher-order terms can have a dramatic influence on the evolution of the cosmology, avoiding the onset of finite time singularities. We also confirm and extend some of results which were obtained in the past for this class of theories.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.99.104001