Determine cosmological predictions of CQ scalar–tensor gravity

Investigate the cosmological-scale predictions of classical–quantum scalar–tensor gravity models, including decoherence of quantum spacetimes and diffusion in the effective Newtonian constant, and assess their implications for inflation, large-scale structure, and precision cosmology.

Background

The model suggests generic low-energy phenomena (decoherence tied to curvature and diffusion in the scalar field), and similar behaviors may arise in broader CQ Horndeski-type couplings. The paper notes potential relevance to cosmology but defers detailed analysis.

A systematic cosmological paper would test whether CQ scalar–tensor gravity yields distinct observational signatures, constraints, or resolutions of known tensions compared to GR and conventional modified gravity.