By Ryohei Kobayashi and others

We examine topological terms of *(2+1)*d sigma models and their consequences in the light of classifications of invertible quantum field theories utilizing bordism groups. In particular, we study the possible topological terms for the *U(N)/U(1)^N* flag-manifold sigma model in detail. We argue that the Hopf-like term is absent, contrary to... Show more

June 8, 2021

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Topological terms of (2+1)d flag-manifold sigma models

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