- 04-150 Hellmut Baumgaertel, Hendrik Grundling
- Superselection and Constraints
May 12, 04
(auto. generated ps),
of related papers
Abstract. For systems which contain both
superselection structure and constraints, we study compatibility
between constraining and superselection. Specifically, we start with a
generalisation of Doplicher-Roberts superselection theory
to the case of nontrivial centre, and a set of Dirac quantum constraints
and find conditions under which the superselection structures will
survive constraining in some form. This involves an analysis
of the restriction and factorisation of superselection structures.
We develop an example for this theory, modelled on interacting QED.