Phase-space representation of amplitude-squared squeezing
Mark S. Hillery · Physical Review A · 1992
Phase-space pictures have proven to be useful in analyzing standard squeezing. Here such pictures are developed for amplitude-squared squeezing, a form of higher-order squeezing. They are used to examine amplitude-squared squeezing of the squeezed vacuum state and to suggest a method of producing amplitude-squared squeezed states using a nonlinear interferometer. The phase-space representation of a variable which is a mixture of the usual amplitude-squared squeezing variables is also discussed.