Abstract
This paper introduces the LLG equation—a novel relativistic quantum mechanical framework derived from first principles of energy conservation and mass-energy-potential equivalence. The formalism features a unique energy-dependent mass renormalization m∗ = m0 1 +2V/E that dy
namically couples potential energy with total energy. Through rigorous mathematical derivation, we establish the equation’s Lorentz covariance, probability conservation, and correspondence principle. Experimental validation across strong-field quantum systems demonstrates unprecedented accuracy, outperforming both the Dirac equation and LLS equation. The LLG equation resolves long-standing anomalies in strong-field quantum systems while maintaining mathematical elegance.



![Author ORCID: We display the ORCID iD icon alongside authors names on our website to acknowledge that the ORCiD has been authenticated when entered by the user. To view the users ORCiD record click the icon. [opens in a new tab]](https://www.cambridge.org/engage/assets/public/coe/logo/orcid.png)