We then use the same method to derive the relativistic “proper-time/rest-energy” transformation matrices, from which we obtain the quantum evolution equation of the rest-energy with the proper-time.
For inertial frames, these equations can be reduced to the usual time dependent Schroedinger (or Klein Gordon) equations, however they are also valid for ACCELERATING frames. A simple semiclassical approximation in which the general relativistic orbit equations are incorporated in our formula for the wave function for a free-particle in curved spaces is then provided and applied to the case of a particle near a gravitational singularity.
Peter Staanum and Nicolai Nygaard