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The cosmological frame principle and cosmic acceleration

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arxiv 2304.12733 v2 pith:7M2CK7BY submitted 2023-04-25 gr-qc hep-th

Spiros Cotsakis , Jose P. Mimoso , John Miritzis This is my paper · ORCID
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keywords cosmologicalframeprincipleaccelerationcosmicframesimplicationssolutions
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We discuss implications of the cosmological frame principle which states that cosmological effects of modified gravity must be stable as solutions of each of the corresponding sets of dynamical equations holding in the two conformally-related frames. We show that there are such globally stable, `frame-independent' solutions describing cosmic acceleration, suggesting that they may represent a physically relevant effect. This result highlights the importance of further investigation into the implications of the frame principle for cosmological properties that rely on the use of conformal frames.

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  1. Differential Obstructions to Curvature-Dependent Conformal Transformations

    gr-qc 2026-08 accept novelty 6.0 of 10

    Curvature-dependent conformal transformations such as g-tilde = F(R[g])g are not local changes of metric variables: their inverse requires solving a differential equation, so no finite-jet metric-only inverse exists g...

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