Two “lenses” to view gravity – when mathematics builds a bridge between two universes

Two researchers from the Vatican Observatory ( www.vaticanobservatory.org – www.vaticanobservatory.va), Fr. Gabriele Gionti, S.J., and Fr. Matteo Galaverni, have uncovered a surprising result: there are two different mathematical frameworks – known as the Jordan frame and the Einstein frame – for describing gravity when a scalar field is involved…

https://epjc.epj.org/articles/epjc/abs/2025/07/10052_2025_Article_14447/10052_2025_Article_14447.html