Stability as the Selection Principle of Reality - A Structural Bridge Between Quantum Configuration Space and Persistent Physical Reality

This paper proposes a structural principle that explains how physical reality emerges from quantum configuration space. While quantum mechanics describes systems as superpositions of possible configurations, it does not by itself explain why only certain configurations persist as physical reality under interaction. We introduce stability as a necessary condition for persistence, defined in terms of the ability of configurations to produce consistent outcomes under repeated interaction. Configurations that fail to meet this condition cannot be empirically identified and therefore cannot constitute elements of physical reality. The framework does not modify the formalism of quantum mechanics, but provides a structural account of how probabilistic configuration spaces give rise to persistent reality. It thereby offers a bridge between quantum foundations and higher-level concepts such as identity and coherence.