The Crush-Void Cycle (CVC): A Density-Triggered Cosmological Oscillation

Description

This paper introduces the Crush-Void Cycle (CVC), a conceptual cosmological model emerging naturally from the density-dependent dynamics proposed in the Expanse Tension Theory (ETT) research programme.

Within ETT, cosmic expansion is mediated by a universal scalar field Φ whose coupling to mass varies as a function of environmental mass-energy density. Previous work in the programme has demonstrated that many unexplained cosmic phenomena—including galaxy rotation anomalies, gravitational lensing discrepancies, neutron-star behaviour, and late-time cosmic acceleration—appear systematically associated with transitions between distinct density regimes of the universe.

The Crush-Void Cycle represents the cosmological consequence of this density-dependent framework. As cosmic density evolves over time, the coupling dynamics between matter and the expansion field naturally produce two extreme regimes:

• Ultra-High Density (UHD) regimes associated with compact-object dominance and gravitational compression.

• Ultra-Low Density (ULD) regimes characterised by large cosmic voids and extreme rarefaction.

In this framework, both regimes represent dynamical instabilities of the cosmic system. Ultra-high density collapse produces the ignition event commonly recognised as the Big Bang, initiating expansion. Conversely, extreme ultra-low density conditions ultimately trigger a secondary instability that initiates contraction, described here as the Small Bang.

The resulting process forms a repeating cosmological sequence:

Tiny Crush Phase → Expansion Phase → Giant Void Phase → Contraction Phase.

The Crush-Void Cycle is therefore not an arbitrary cyclic cosmology, but rather the natural long-term outcome of density-dependent coupling in an ETT universe. As density evolves through the regimes identified in the ETT framework, the cycle emerges as the inevitable large-scale dynamical behaviour of the system.

This short paper documents the conceptual model, illustrates the full cycle diagram, and briefly compares the framework with other cyclic cosmologies, including Conformal Cyclic Cosmology proposed by Roger Penrose.

The work is intended as a concise conceptual introduction to the Crush-Void Cycle, establishing the model and its relationship to the broader ETT density-dependent cosmological framework. Further work will explore mathematical formalisation and potential observational signatures of the cycle.