Local normality of infravacua and relative normalizers for relativistic systems

Bartosz Biadasiewicz, Wojciech Dybalski
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.