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math-ph2019
Aharonov-Bohm superselection sectors
Claudio Dappiaggi, Giuseppe Ruzzi, Ezio Vasselli
We show that the Aharonov-Bohm effect finds a natural description in the setting of QFT on curved spacetimes in terms of superselection sectors of local observables. The extension…
math-ph2018
Background potentials and superselection sectors
Ezio Vasselli
The basic aspects of the Aharonov-Bohm effect can be summarized by the remark that wavefunctions become sections of a line bundle with a flat connection (that is, a "flat potential…
math-ph2018
Linking numbers in local quantum field theory
Detlev Buchholz, Fabio Ciolli, Giuseppe Ruzzi +1
Linking numbers appear in local quantum field theory in the presence of tensor fields, which are closed two-forms on Minkowski space. Given any pair of such fields, it is shown tha…