Point Transformations in Quantum Mechanics
- 15 February 1952
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 85 (4), 653-661
- https://doi.org/10.1103/physrev.85.653
Abstract
An isomorphism is shown to exist between the group of point transformations in classical mechanics and a certain subgroup of the group of all unitary transformations in quantum mechanics. This isomorphism is used to indicate that the quantum analogs of physically significant classical expressions can be constructed uniquely in any coordinate system. There is no ambiguity in the ordering of noncommuting quantum operators, and the method of constructing the quantum analogs is covariant under general coordinate transformations. The method is actually only applicable to systems having Lagrangians which are at most quadratic in the velocities, but this includes all systems which are presently of interest in physics. The method is applied to two intrinsically nonlinear examples, one of which is the gravitational field. The correct Hamiltonian operator for a quantized version of Einstein's gravitational theory is constructed.Keywords
This publication has 3 references indexed in Scilit:
- Sur le problème des relations entre les transformations unitaires de la Mécanique quantique et les transformations canoniques de la Mécanique classiqueBulletin. Academie Royale Des Sciences, Des Lettres Et Des Beaux-Arts de Belgique. Classe Des Sciences, 1951
- On the Quantization of Einstein's Gravitational Field EquationsPhysical Review B, 1950
- Generalized Hamiltonian DynamicsCanadian Journal of Mathematics, 1950