Local normality of infravacua and relative normalizers for relativistic systems

June 03, 2021
We revisit the problem of local normality of Kraus-Polley-Reents infravacuum representations and provide a straightforward proof based on the Araki-Yamagami criterion. We apply this result to the theory of superselection sectors. Namely, we extend the novel formalism of second conjugate classes and relative normalizers to the local relativistic setting.

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