This work develops an extension of the Breathing Universe Model (BUM) in which cosmic evolution arises from a hybrid vacuum dynamics combining continuous evolution with discrete reconfiguration events. The framework introduces an intermediate oscillatory phase in which vacuum tension organizes into coherent, time-crystal-like structures that store imbalance in a reversible manner. The central new concept is nested snapping: a hierarchy of dynamically triggered phase transitions in which accumulated vacuum tension is released through discrete re-alignments of the vacuum state. These events produce step-like modifications to the effective vacuum energy, while the system evolves quasi-continuously between transitions. As a result, observable cosmological dynamics emerge as a coarse-grained combination of smooth redistribution and discrete updates. Within this framework, late-time cosmic acceleration is interpreted as the cumulative, time-averaged effect of many small vacuum reconfiguration events rather than a strictly constant cosmological term. The model remains consistent with standard relativistic cosmology at leading order, while predicting controlled, subleading deviations. Observable signatures include weak oscillatory features in the expansion history and equation-of-state parameter, phase-dependent effects in structure formation, and subtle modifications to gravitational-wave propagation. A key prediction is the presence of phase-coherent signatures across independent cosmological probes, providing a distinctive and falsifiable observational test. The nested snapping framework offers a unified and testable description linking vacuum dynamics, spacetime emergence, and multi-scale physical phenomena within an effective-field-theory context.
Ivo Gerlach Angela Noel Cerfontaine (Wed,) studied this question.