Gravity as a Multi-Layered Phenomenon: Entanglement, Entropy, and Curvature

The nature of gravity remains a central open question in theoretical physics. While general relativity interprets gravity as spacetime curvature, recent advances suggest that gravity may be emergent from deeper microscopic mechanisms involving quantum entanglement and entropy. In this manuscript, we propose a layered framework in which gravity is understood as a combined phenomenon: (i) a microscopic layer of entanglement between subspaces of a diagram Hilbert space, (ii) a statistical layer where entropy emerges as the coarse-grained measure of these correlations, and (iii) a macroscopic layer where curvature represents the effective geometric manifestation. This unified picture synthesizes insights from black hole thermodynamics, quantum information theory, holography, and emergent gravity models. We argue that the interplay between these layers provides a consistent pathway toward a quantum theory of gravity and suggests concrete experimental signatures.