Symmetries of the Hamiltonian operator and constants of motion

G. F. Torres del Castillo, J. E. Herrera Flores

Published 2015-10-15Version 1

It is shown that, in the framework of non-relativistic quantum mechanics, any conserved Hermitian operator (which may depend explicitly on the time) is the generator of a one-parameter group of unitary symmetries of the Hamiltonian and that, conversely, any one-parameter family of unitary symmetries of the Hamiltonian is generated by a conserved Hermitian operator.