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physics.optics2025
Color and Transparency from Quantum Geometry
Chang-geun Oh, Sun-Woo Kim
The optical properties of solids are governed not only by their energy band dispersions but also by the quantum geometry of Bloch states. While the role of energy bands in determin…
cond-mat.str-el2025
Mass-invariant universal optical conductivity from quantum geometry
Chang-geun Oh, Sun-Woo Kim, Kun Woo Kim +2
Mass is a defining property of particles, shaping their fundamental nature and interactions. In condensed matter systems, the effective mass of electrons has long been regarded as…