# Interacting SPT phases are not Morita invariant

@inproceedings{Stehouwer2021InteractingSP, title={Interacting SPT phases are not Morita invariant}, author={Luuk Stehouwer}, year={2021} }

Class D topological superconductors have been described as invertible topological phases protected by charge Q and particle-hole symmetry C. A competing description is that class D has no internal symmetries except for the fermion parity group ZF2 = {1, (−1) F }. In the weakly interacting setting, it can be argued that ‘particle-hole symmetry cancels charge’ in a suitable sense. Namely, the classification results are independent of which of the two internal symmetry groups are taken because of…

## One Citation

Rigorous Index Theory for One-Dimensional Interacting Topological Insulators

- Physics, Mathematics
- 2021

We present a rigorous but elementary index theory for a certain class of one-dimensional systems of interacting fermions that includes the Su-Schrieffer-Heeger (SSH) model as a special case. We prove…

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