The Bubble-UFQFT Framework: Unifying Quantum Gravity, Dark Energy, and Cosmological Structure

The standard ΛCDM model has been remarkably successful in explaining many features of the cosmos; however, it remains theoretically incomplete. Its reliance on a primordial singularity, the unexplained nature of dark energy, and its incompatibility with quantum gravity at Planck scales point to fundamental gaps in our understanding of the universe. This study proposes a holographic bubble universe framework as a viable alternative, addressing these limitations through a physically motivated and observationally testable model.In this approach, the universe is treated as a 3+1-dimensional bubble embedded in a higher-dimensional quantum medium. The model eliminates the need for an initial singularity by replacing it with a finite quantum fluctuation in a pre-geometric background. Cosmic expansion arises naturally from the negative pressure exerted by the external environment—mimicking dark energy dynamics without invoking a finely tuned cosmological constant. Moreover, the model integrates the holographic principle by encoding information on the 2+1D boundary, thereby preserving unitarity and resolving entropy paradoxes inherent in the standard model.The framework yields concrete, testable predictions: echoes and anisotropies in the Cosmic Microwave Background (CMB), discrete gravitational wave modes, and topological features in large-scale structure distributions. These signatures are consistent with recent data from DESI, LISA, and Euclid, offering a promising avenue to reconcile observational cosmology with quantum gravity. By addressing the foundational weaknesses of ΛCDM—particularly the singularity problem and the ad hoc treatment of dark energy—the bubble universe model offers a unified, falsifiable, and conceptually coherent cosmological paradigm.