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Chameleon perfect scalar field as a geometric correction in f(R) gravity

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arxiv 2303.16815 v1 pith:HSJR4Z2F submitted 2023-03-29 gr-qc

Chameleon perfect scalar field as a geometric correction in $f(R)$ gravity

classification gr-qc
keywords perfectchameleonscalarfieldpossibleanalyticalassumingbackground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

In this work, we derive the analytical form for a $f(R)$ model that describes a perfect scalar field $\phi$ by assuming the existence of a chameleon mechanism. Based on four statements, at the background and perturbative level, it is possible to relate the extra terms from this theory as a geometrical perfect fluid term, whose has been expressed as possible candidates to explain the nature of the dark sector, and possibly, in the case of a perfect scalar chameleon during inflation, satisfy the big bang nucleosynthesis (BBN) constraints until late times.

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