This manuscript introduces Confined Curvature Bounce Theory (CCBT), a speculative covariant effective model for nonsingular black-hole interiors and possible cosmological coupling. The theory proposes that when an invariant curvature threshold is reached, a confined curvature-bounce phase replaces the classical singularity, producing an internal support-scale expansion without requiring white-hole ejection. The model distinguishes the external apparent-horizon radius from the internal proper support length, introduces a hierarchy L₁ ≃ L₂ < L₃ <. . . < Lₙ << L₍+₁, and explores how the resulting active curvature sector could behave as an effective negative-pressure component after cosmological coarse-graining. The paper is presented as a theoretical hypothesis and effective-model framework, not as established physics or as a complete derivation from a confirmed theory of quantum gravity. Version 6: This upgraded manuscript formulates Confined Curvature Bounce Theory (CCBT) as a covariant effective model with a metastable quantum-geometric active sector. Version 6. 0 integrates the central lesson of the companion toy-model program: instantaneous curvature activation is not a robust support-growth source, while the conditionally surviving branch requires a metastable holonomy-condensate order parameter, a holonomy-cell mixing barrier, and an open-system relaxation/spectral-kernel framework. The paper remains a theoretical hypothesis and effective framework, not established physics or a complete derivation from a confirmed theory of quantum gravity.
Othmane Zniber (Sun,) studied this question.