Constrained quantization and $θ$-angles

Details Constrained quantization and $θ$-angles Constrained quantization and $θ$-angles

1997-06-25

arxiv.org/abs/hep-th/9706178v1

Nucl.Phys. B502 (1997) 537-560

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, LaTeX

Scientific paper

10.1016/S0550-3213(97)00441-0

We apply a new and mathematically rigorous method for the quantization of constrained systems to two-dimensional gauge theories. In this method, which quantizes Marsden-Weinstein symplectic reduction, the inner product on the physical state space is expressed through a certain integral over the gauge group. The present paper, the first of a series, specializes to the Minkowski theory defined on a cylinder. The integral in question is then constructed in terms of the Wiener measure on a loop group. It is shown how $\th$-angles emerge in the new method, and the abstract theory is illustrated in detail in an example.

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