Abstract
An example of a quantum cosmological model is presented whose dynamics is unitary although the time-dependent Hamiltonian operator fails to be self-adjoint (because it is not defined) for a particular value of t. The model is shown to be singular, and this disproves a conjecture put forward by Gotay and Demaret to the effect that unitary quantum dynamics in a ‘‘slow-time’’ gauge is always nonsingular.
- Received 23 June 1989
DOI:https://doi.org/10.1103/PhysRevD.41.1358
©1990 American Physical Society