Emergent Vacuum Response in Coherent Nonequilibrium Electromagnetic Systems

This paper presents Emergent Vacuum Response Theory (EVRT) as a constrained, phenomenological framework for testing whether coherent nonequilibrium electromagnetic systems can exhibit small, resonance-dependent deviations from standard linear electrodynamic behavior. Rather than proposing new fundamental particles or exotic forces, the model introduces an effective pseudoscalar response coordinate as a collective vacuum parameter and derives its expected behavior under controlled experimental conditions. The work emphasizes falsifiability by identifying a minimal set of measurable observables such as temperature-dependent cavity ringdown, phase lag, linewidth variation, and magnetic-field scaling and proposing a realistic high-Q cavity experiment capable of discriminating the model from conventional electromagnetic effects. The framework explicitly preserves known conservation laws and excludes interpretations involving propulsion, antigravity, or energy extraction. Overall, the paper reframes the problem from one of speculative new physics to one of precision experimental discrimination, where both positive detections and robust null results provide meaningful scientific constraints on nonequilibrium electromagnetic behavior.