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Scalar Perturbations and Conformal Transformation

Julio C. Fabris·Joel Tossa
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Abstract

The non-minimal coupling of gravity to a scalar field can be transformed into a minimal coupling through a conformal transformation. We show how to connect the results of a perturbation calculation, performed around a Friedmann-Robertson-Walker background solution, before and after the conformal transformation. We work in the synchronous gauge, but we discuss the implications of employing other formalisms.

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Julio C. Fabris, Joel Tossa. 1996-04-02. Scalar Perturbations and Conformal Transformation. https://arxiv.org/abs/gr-qc/9604006

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