First-Principles Quantum Electrodynamics Theory of Light-Matter Interactions at All Coupling Strengths

This presentation introduces VT-QEDHF, a novel first-principles quantum electrodynamics method developed to understand light-matter interactions at any coupling strength. The intersection of QED with materials science has catalyzed significant advancements in manipulating materials properties. Traditional computational approaches, while effective, have been limited by their applicability to specific coupling regimes. Our work breaks away from the limitations of conventional approaches, offering a universal and efficient way to study light-matter interactions across various coupling regimes. Our findings open up new possibilities for researching and manipulating material properties via light-matter couplings.