Communications in Theoretical Physics
Two-Mode Phase Operator and Phase State Studied in Number-Difference Orthonormal Representation
Fan Hong‐Yi, Zou Hui
Abstract
We study the properties of two-mode phase operator and the phase state by constructing the number-difference orthonormal state . We prove that constitutes a complete and orthonormal representation (number-difference representation). We show that two-mode phase operator exhibits its phase behavior explicitly in the number-difference representation, which resembles the single-mode phase operator . The corresponding phase state is also studied.