Collapse of a two-mode squeezed state after registeringn-single mode photons
X.C. Li, Heng Fan, Zechen Li · Journal of Modern Optics · 2012
By enquiring what happens to the remaining mode when one makes one-mode n-photon counting for the two-mode squeezed state, we show that the two-mode squeezed state will collapse to a counting operator in the remaining mode with a new smaller quantum efficiency of the detector. We also derive its P-representation.