5D Foam Cosmology

Abstract
This paper presents a theoretical framework extending conventional four-dimensional spacetime into a five-dimensional foam cosmology. Building upon Kaluza-Klein theory and modern brane-world scenarios, it is proposed that the observable universe exists as one of multiple 4D spacetime manifolds embedded within a higher-dimensional quantum foam structure.

The fifth dimension is hypothesized to exhibit a dynamic, bubble-like topology analogous to Wheeler’s quantum foam, with each stable region capable of supporting a complete 4D spacetime continuum. This framework offers novel perspectives on the hierarchy problem, the nature of dark matter, cosmological origins, and the fine-tuning of physical constants. Specific observational predictions are proposed involving gravitational wave astronomy, cosmic microwave background analysis, dark matter distribution patterns, and high-energy particle physics. The paper aims to contribute a testable geometric hypothesis to ongoing discussions in cosmology and fundamental physics.