The paper introduces vector-field overlaps from quantum geometry to identify maximal mean-field susceptibilities and correlation lengths for orders in flat bands, with examples of hidden antiferromagnetic nesting and FFLO-like states checked via DQMC.
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Quantum geometric semimetals produce instantaneous steady-state current under electric fields via interband coupling from Hilbert-Schmidt quantum distance and finite density of states at band-touching points, outperforming metals, semiconductors, and graphene in switching speed.
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Identifying Instabilities with Quantum Geometry in Flat Band Systems
The paper introduces vector-field overlaps from quantum geometry to identify maximal mean-field susceptibilities and correlation lengths for orders in flat bands, with examples of hidden antiferromagnetic nesting and FFLO-like states checked via DQMC.
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Ultrafast Current Switching from Quantum Geometry in Semimetals
Quantum geometric semimetals produce instantaneous steady-state current under electric fields via interband coupling from Hilbert-Schmidt quantum distance and finite density of states at band-touching points, outperforming metals, semiconductors, and graphene in switching speed.