Yin-Yang Dynamics: The Evolution Mechanism of Physical Systems and the Reconstruction of Causality

Standard physics confronts three deep fractures between macroscopic thermodynamics, microscopic quantum mechanics, and cosmology: the origin of the irreversibility of the arrow of time, causal inversion in quantum measurement, and dynamical singularities where pure-state physical systems cannot maintain self-sustaining evolution. This paper proposes “Yin-Yang Dynamics,” defining it as the underlying non-linear mechanism driving the evolution of all physical systems. Abandoning the traditional approach of treating Yin and Yang as static attributes or philosophical metaphors, the article establishes the ontological status of “Yin and Yang as the fundamental architecture of system dynamics.” On this basis, it constructs the “Yin-Yang non-commutative algebra” and the “Yin-Yang state transition matrix,” deducing the critical phase transition equations for system evolution. The study demonstrates that time is not an external container, but a lawful sequential structure generated by the mutual rooting and waxing/waning of Yin and Yang; traditional linear causality is reconstructed within the Yin-Yang topology as closed-loop “mutual-root causality.” This mechanism not only exhibits high isomorphism in microscopic quantum delayed-choice experiments and macroscopic dissipative structures, but also mathematically reconstructs the laws of causality and the arrow of time. This paper provides a rigorous and derivable non-Western ontological approach for constructing a unified dynamics beyond reductionism.