Hy. Fan et M. Xiao, NUMBER-DIFFERENCE-PHASE UNCERTAINTY RELATION FOR NFM OPERATIONAL QUANTUM PHASE DESCRIPTION, Physics letters. A, 227(3-4), 1997, pp. 192-196
For the Noh, Fougers, and Mandel (NFM) operational quantum phase descr
iption, which is based on an eight-port homodyne-detection, we propose
the number-difference-phase (ND-P) uncertainty relation and, then, di
scuss the mechanism of generation of ND-P squeezed states.