Ordering of "ladder" operators, the Wigner function for number and phase, and the enlarged Hilbert space
A. Lukš, Vlasta Peřinová · Physica Scripta · 1993
A suitable ordering of phase exponential operators has been compared with the antinormal ordering of the annihilation and creation operators of a single mode optical field. The extended Wigner function for number and phase in the enlarged Hilbert space has been used for the derivation of the Wigner function for number and phase in the original Hilbert space.