This preprint introduces Activation A, a universal scalar that quantifies irreversibility across nuclear, thermodynamic, and gravitational systems. The AE framework reformulates entropy production as a measurable activation process, linking nuclear decay behavior, non‑equilibrium thermodynamics, and gravitational coupling through a single state variable. The work demonstrates that Activation A provides a consistent geometric structure for state evolution, resolves key asymmetries in conventional entropy definitions, and offers a unified mechanism for decoherence and gravitational interaction. The manuscript presents the theoretical foundations, mathematical formulation, and empirical motivation for AE, supported by nuclear activation data and cross‑domain consistency tests. This preprint establishes AE as a candidate framework for unifying irreversibility, entropy, and gravity under one activation‑based law.
Arild Ove Aarskog (Mon,) studied this question.