3 papers
quant-ph2026
Light-Matter Interactions Beyond the Dipole Approximation in Extended Systems Without Multipole Expansion
Rishabh Dora, Roman Korol, Vishal Tiwari +2
We present a general theoretical framework to capture light-matter interactions beyond the electric-dipole approximation (EDA), applicable to extended nano- and microscale material…
physics.optics2025
Robust purely optical signatures of Floquet states in laser-dressed crystals
Vishal Tiwari, Roman Korol, Ignacio Franco
Strong light-matter interactions can create non-equilibrium materials with on-demand novel functionalities. For periodically driven solids, the Floquet theorem provides the natural…
cond-mat.mtrl-sci2025
First-principle based Floquet engineering of solids in the velocity gauge
Vishal Tiwari, Ignacio Franco
We introduce a practical and accurate strategy to capture light-matter interactions using the Floquet formalism in the velocity gauge in combination with realistic first-principle…