Dynamics with unitary phase operator:implications for Wigner's problem
arXiv:quant-ph/0107133 · doi:10.1016/S0375-9601(01)00807-6
Abstract
We show that for general deformations of SU(2) algebra, the dynamics in terms of ladder operators is preserved. This is done for a system of precessing magnetic dipole in magnetic field, using the unitary phase operator which arises in the polar decomposition of SU(2) operators. It is pointed out that there is a single phase operator dynamics underlying the dynamics of usual and deformed ladder operators.
LaTeX 12 pages, revised version, accepted for Physics Letters A