Experimental Sensitivity Limits and Testability of Electromagnetic Stress Asymmetry in Resonant Cavities

This work presents a quantitative assessment of the experimental testability of electromagnetic stress asymmetry in resonant cavity systems within the framework of Emergent Vacuum Response Theory (EVRT). Using experimentally realistic force sensitivity limits and established scaling relations, the accessible parameter space for detecting or constraining effective stress-asymmetry effects is mapped. By connecting measurable force thresholds to theoretical parameter bounds, the analysis provides a direct interpretation of null experimental results. For representative tabletop resonator configurations, current experimental capabilities imply constraints near χₑff ≲ 10⁻¹⁷, while improved force sensitivity may probe significantly lower regimes. This work establishes a clear relationship between experimental sensitivity and falsifiability, defining explicit exclusion regions for effective response parameters. It represents the experimental feasibility stage of the EVRT research program, bridging prior theoretical modeling, numerical simulations, and constraint analyses with real-world measurement capabilities.