Upper Bounds on Effective Electromagnetic Stress Asymmetry in Resonant Cavities: Constraint Analysis of Emergent Vacuum Response Theory

This work establishes quantitative upper bounds on phenomenological electromagnetic stress-asymmetry effects in asymmetric resonant cavity systems. Building on Emergent Vacuum Response Theory (EVRT), which proposes a testable framework for nonequilibrium electromagnetic stress redistribution, the present analysis constrains the magnitude of any such effect using experimentally relevant sensitivity limits. Rather than asserting the existence of anomalous forces, the approach follows standard physical methodology by bounding effective response parameters using noise-floor considerations, scaling relations, and representative system parameters. For typical tabletop resonator configurations, the effective response parameter is constrained to χ_eff ≲ 10⁻¹⁷, indicating that any EVRT-like effect must be extremely small under current experimental sensitivity. This work represents the constraint stage of the EVRT research program, bridging prior predictive modeling and simulation efforts with future experimental validation. By converting EVRT into a quantitatively constrained hypothesis, the analysis clarifies the parameter space accessible to experimental tests and provides a framework for systematic falsification or validation.