A. Inomata et al., TOPOLOGICAL CHARGE QUANTIZATION VIA PATH INTEGRATION - AN APPLICATIONOF THE KUSTAANHEIMO-STIEFEL TRANSFORMATION, Foundations of physics, 23(8), 1993, pp. 1073-1091
The unified treatment of the Dirac monopole., the Schwinger monopole,
and the Aharonov-Bohm problem by Barut and Wilson is revisited via a p
ath integral approach. The Kustaanheimo-Stiefel transformation of spac
e and time is utilized to calculate the path integral for a charged pa
rticle in the singular vector potential. In the process of dimensional
reduction, a topological charge quantization rule is derived, which c
ontains Dirac's quantization condition as a special case.