Virtual Talk: Local response in bulk-gapped interacting systems

Stefan Teufel
Eberhard-Karls-Universität Tübingen
Mathematics

In my talk, I will first discuss effective descriptions from physics for the quantum Hall effect in the realistic setting of thin Hall bars. Then I recall recent results on the response of interacting fermion systems that are gapped in the bulk to local perturbations and place them in this context. This offers a somewhat different perspective on the problem than the standard one in mathematical physics, which focuses on quantised bulk and indices indices.

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