Local moment maps and the splitting of classical multiplets

Details Local moment maps and the splitting of classical multiplets Local moment maps and the splitting of classical multiplets

1999-03-08

arxiv.org/abs/math-ph/9903015v2

Physics

Mathematical Physics

Some misprints corrected; some points clarified

Scientific paper

We generalize the concept of global moment maps to local moment maps, whose different branches are labelled by the elements of the fundamental group of the underlying symplectic manifold. These branches can be smoothly glued together by employing fundamental-group-valued \u Cech cocycles on the phase space. In the course of this work we prove a couple of theorems on the liftability of group actions to symplectic covering spaces, and examine the possible extensions of the original group by the fundamental group of the quotient phase space. It it shown how the splitting of multiplets, this being a consequence of the multiply-connectedness of the quotient phase space, can be described by identification maps on a space of multiplets derived from a symplectic universal covering manifold. The states that are identified in this process are related by certain integrals over non-contractible loops in the quotient phase space.

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