Entanglement-Dependent Frequency Shifts Beyond Quantum Electrodynamics: Experimental Evidence from the SpinQ Platform

We report an experimental investigation of frequency shifts in multipartite entangled quantum systems using a SpinQ-compatible quantum platform. By systematically varying the number of entangled qubits $N$ while holding all geometric and electromagnetic parameters fixed, we test whether observed frequency shifts can be explained solely by quantum electrodynamics (QED), including the Lamb shift, or whether an additional entanglement-dependent contribution is required. We formulate and compare two competing models: a QED-only model predicting an $N$-independent shift, and a QED+EWOG model incorporating an entanglement-weighted correction motivated by Entanglement-Weighted Operator Gravity (EWOG). Rigorous statistical analysis---using root-mean-square error (RMSE), coefficient of determination ($R^2$), residual diagnostics, and the Akaike Information Criterion (AIC)---demonstrates decisive evidence in favor of the EWOG extension. Our results provide quantitative experimental support for the hypothesis that multipartite entanglement induces an effective geometric correction to coherent quantum dynamics beyond standard QED.