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cond-mat.str-el2024
Entanglement entropy in lattice models with quantum metric
Alexander Kruchkov, Shinsei Ryu
We revisit the connection between entanglement entropy and quantum metric in topological lattice systems, and provide an elegant and concise proof of this connection. In gapped two…
cond-mat.str-el2024★ 1 cited
Higher Hall conductivity from a single wave function: Obstructions to symmetry-preserving gapped edge of (2+1)D topological order
Ryohei Kobayashi, Taige Wang, Tomohiro Soejima +2
A (2+1)D topological ordered phase with U(1) symmetry may or may not have a symmetric gapped edge state, even if both thermal and electric Hall conductivity are vanishing. It is re…
cond-mat.str-el2024★ 2 cited
Higher bracket structure of density operators in Weyl fermion systems and topological insulators
Edwin Langmann, Shinsei Ryu, Ken Shiozaki
We study the algebraic structure of electron density operators in gapless Weyl fermion systems in spatial dimensions and in topological insulators (without any pro…