Causal–Continuity Stabilization Theory (CCST): Thermodynamic Stability and Branch-Internal Descriptive Continuity in Everettian Dynamics. DOI: https://doi.org/10.17605/OSF.IO/D6JN7. Causal–Continuity Stabilization Theory (CCST) is an interpretive framework that addresses the persistence of macroscopic descriptive continuity within fully unitary Everettian quantum mechanics. Rather than invoking ontological selection, probabilistic collapse, or inter-branch transition, CCST reframes continuity as a stability property of a finite physical substrate subject to irreversible thermodynamic and dynamical constraints. The theory introduces Thermodynamic Strain as a path-dependent measure of cumulative irreversible burden required to maintain coherent macroscopic descriptive structure across decoherence and branching. CCST remains fully compatible with standard quantum mechanics and preserves the physical reality of all branches, while providing an explicit stability-based criterion for when continuous macroscopic description remains physically well posed.
The program of deducing quantum mechanics from the postulate of thermodynamic continuity is extended to embrace the principles of symmetry and quantum statistics, in particular the rule of conservation of symmetry type when a system of N particles in resonance interaction is augmented by one more particle. The special quantitative definition of quantum conjugacy contained in the commutation rule of Born and in the Schrödinger replacement of the momentum p by a differential operator may be replaced by a general qualitative physical definition: “p and q are conjugate observables in a mechanical system when the manifold of q reactions of the system uniquely determines the manifold of its p reactions.” When interpreted in terms of superposition mechanics this definition leads to the rules of Born and Schrödinger and from there to quantum dynamics.