The Superbubble Universe: A Unified Cosmological Framework from Superfluid False Vacuum Microphysics

This repository contains the defining framework paper for the Superfluid False Vacuum / de Sitter Brane (SFV/dSB) model, also referred to as the Superbubble Universe. The SFV/dSB framework is a first-principles cosmological program in which the observable universe originates as a thick-wall de Sitter brane nucleated via an O(4) Coleman–De Luccia bounce in a superfluid false vacuum.

The model is defined by a fixed set of SFV microphysical parameters and a unique corridor bounce solution. From this backbone, cosmological and particle-physics observables are derived through a closed derivation pipeline rather than introduced as independent phenomenological inputs. A central feature of the framework is the emergence of time for brane-localized observers through dynamical decoupling between brane and bulk degrees of freedom. This emergent-time mechanism preserves the successful early-universe predictions of ΛCDM while providing a microphysical explanation for late-time observational tensions, including the Hubble tension, without invoking modified gravity or a fundamental late-time dark energy component.

The framework explicitly maintains the standard Gaussian perturbation structure underlying baryon acoustic oscillations (BAO) and cosmic microwave background (CMB) power spectra. Observable deviations from ΛCDM arise primarily through the interpretation of cosmological time and through higher-order (non-Gaussian) statistics sourced by SFV dynamics, rather than through distortions of the two-point power spectra.

This paper serves as the canonical definition of the SFV/dSB framework. It specifies the ontology, benchmark parameters, assumptions, scope, and falsifiability criteria of the model, and unifies a series of previously published and forthcoming works addressing cosmological expansion, matter content, particle mass hierarchies, electroweak scales, primordial structure formation, and late-time acceleration. Detailed derivations and observational tests are provided in companion papers referenced herein.

The SFV/dSB framework is intentionally constrained and falsifiable. Its validity depends on the existence of an emergent cosmological clock consistent with BAO and CMB observations, the closure of its derivation pipeline linking intermediate parameters to SFV microphysics, and consistency across cosmological and particle-physics scales. If successful, the framework offers a route toward unifying the phenomenological successes of ΛCDM and the Standard Model within a single microphysical ontology; if not, its failure provides clear guidance on the limitations of such approaches.