Cosmological scenarios in modified gravity with non-dynamical fields

Abstract

In this paper we address the issue of exploring some cosmological scenarios in modified Einstein gravity through non-dynamical (auxiliary) fields. We found that all scenarios are controlled by a specific parameter associated with an auxiliary field. We explore the emergence of inflationary, radiation, matter and dark energy dominated regimes. Furthermore, an interesting possibility such as the emergence of a self-tuning mechanism to the cosmological constant problem in the radiation dominated era is also discussed.

7 pages, no figure; version to appear in PRD

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Cited by in corpus (3)

• Thick brane models in generalized theories of gravity
• Late Time Cosmological Evolution in f(R) theories with Ordinary and Collisional Matter
• First-order framework for flat brane with auxiliary fields