Strategy to measure the quantum geometric properties in condensed matter systems. Credit: Nature Physics (2024). DOI: 10.1038/s41567-024-02678-8 MIT physicists and colleagues have for the first time measured the geometry, or shape, of electrons in solids at the quantum level. Scientists have long known how to measure the energies and velocities of electrons in crystalline materials, but until now, those systems' quantum geometry could only be inferred theoretically, or sometimes not at all. The ...