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cond-mat.str-el2025
Weak in the boundary: How weak SPT phases spoil anomaly matching
Daniel Sheinbaum, Omar Antolín Camarena
We show how weak symmetry protected topological (SPT) phases on systems with a boundary are not in 1-to-1 correspondence with weak SPT phases on fully periodic systems, breaking th…
cond-mat.str-el2024
Failure of the Crystalline Equivalence Principle for Weak Free Fermions
Daniel Sheinbaum, Omar Antolín-Camarena
Interacting crystalline SPT phases were first classified by Thorngren and Else through the crystalline equivalence principle, suggesting that a spatial group symmetry can be treate…