Reparametrization invariance of path integrals

  title={Reparametrization invariance of path integrals},
  author={H. Kleinert and A. Chervyakov},
  journal={Physics Letters B},
Abstract We demonstrate the reparametrization invariance of perturbatively defined one-dimensional functional integrals up to the three-loop level for a path integral of a quantum-mechanical point particle in a box. We exhibit the origin of the failure of earlier authors to establish reparametrization invariance which led them to introduce, superfluously, a compensating potential depending on the connection of the coordinate system. We show that problems with invariance are absent by defining… Expand
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