Acceleration, Frame Dependence, and the Equivalence Principle in Pre-Geometric Field Theory: A Primeon Framework Analysis

We analyze the behavior of accelerating observers and the status of Einstein’s Equivalence Principle within the Primeon Framework, a pre-geometric field theory in which spacetime emerges from amplitude–phase dynamics of a complex state function defined over primeindexed configuration space. We demonstrate that while uniform motion can preserve operational frame equivalence through amplitude–phase coupling compensation once equilibrium is reached, acceleration drives the coupled system out of equilibrium, creating observable transient effects and rendering the equivalence between acceleration and gravity approximatein a frequency-dependent sense. We define a coupling response timescale, propose regime criteria for adiabatic versus transient behavior, and outline experimental signatures including anisotropic light propagation, modified Unruh-type afterglow effects, and deviations from standard relativistic predictions in rapid-acceleration scenarios. These results suggest that Special Relativity emerges as a low-frequency effective theory valid when characteristic acceleration timescales greatly exceed the fundamental coupling response time.