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cond-mat.str-el2023
Spectral sum rules reflect topological and quantum-geometric invariants
Alexander Kruchkov, Shinsei Ryu
Topological invariants are fundamental characteristics reflecting global properties of quantum systems, yet their exploration has predominantly been limited to the static (DC) tran…
cond-mat.str-el2023
Noise probing of topological band gaps in dispersionless quantum states
Alexander Kruchkov, Shinsei Ryu
We uncover a useful connection between the integrated current noise and the topological band gap in dispersionless quantum states, $\int d ω[ \mathcal S^{\text{flat}}_{xx} +…