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Gaiotto, Davide; Johnson-Freyd, Theo
The journal of high energy physics, 05/2019, Letnik: 2019, Številka: 5Journal Article
A bstract We discuss the classification of SPT phases in condensed matter systems. We review Kitaev’s argument that SPT phases are classified by a generalized cohomology theory, valued in the spectrum of gapped physical systems 20 , 23 . We propose a concrete description of that spectrum and of the corresponding cohomology theory. We compare our proposal to pre-existing constructions in the literature.
