Gravity as Sympathetic Resonance: Why Matter Spirals Around Black Holes Instead of Falling In

Abstract The long-term stability of spiral galaxies presents a persistent challenge for models based on purely attractive gravity. Despite the presence of central supermassive black holes, matter overwhelmingly exhibits stable orbital motion rather than progressive infall, while galactic rotation curves remain approximately flat over large radial extents. In this work, gravity is reformulated as a sympathetic resonance phenomenon, in which massive compact objects act as lowest-frequency coherence anchors rather than simple sinks. Within this framework, matter follows phase-locked trajectories determined by gradients in a scalar coherence field, naturally producing logarithmic spiral motion and outward angular momentum transport. A minimal modification to the Poisson equation introduces a characteristic coherence length scale, recovering Newtonian gravity in the appropriate limit while yielding stable, non-Keplerian orbital solutions at galactic scales. Accretion is reinterpreted as a localized decoherence process rather than the default dynamical outcome. The model reproduces key observed features of disk galaxies without invoking additional unseen matter and leads to falsifiable predictions involving radial phase-lag signatures and coherence-length correlations with central black hole mass.