2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194374It is argued that the fundamental length scale for the quantum dynamics of spacetime need not be equal to the Planck length. Possibly, this new length scale is related to a nonvanishing cosmological constant or vacuum energy density.10 pages with revtex4, v5: published versionGeneral Relativity and Quantum CosmologyHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext