Feynman path integrals on compact Lie groups with bi-invariant Riemannian metrics and Schrödinger equations

Nicoló Drago, Sonia Mazzucchi, Valter Moretti

Published 2023-07-06Version 1

In this work we consider a suitable generalization of the Feynman path integral on a specific class of Riemannian manifolds consisting of compact Lie groups with bi-invariant Riemannian metrics. The main tools we use are the Cartan development map, the notion of oscillatory integral, and the Chernoff approximation theorem. We prove that, for a class of functions of a dense subspace of the relevant Hilbert space, the Feynman map produces the solution of the Schr\"odinger equation, where the Laplace-Beltrami operator coincides with the second order Casimir operator of the group.