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math-ph2022
2-d Fermionic SPT with CRT symmetry
Yoshiko Ogata
An invariant of SPT-phases with on-site finite group symmetry for two-dimensional Fermion systems was derived in [O]. This invariant is doubled compared to the conjectured one…
math-ph2022★ 2 cited
Type of local von Neumann algebras in abelian quantum double model
Yoshiko Ogata
We show that the local von Neumann algebras on convex areas of the frustration-free ground state of abelian quantum double models are of type .