Equal-power higher-power amplitude squeezing of vacuum state immiting asymmetrical five-states superposition multimode functional superposition state;

The bright Einstein-Podolsky-Rosen(EPR) beam (with quantum correlations between the quadrature-phase amplitudes of the spatially separated signals and the idler beams), and the bright two-mode quadrature squeezed light have been experimentally generated from a cw nondegenerate optical parametric amplifier (NOPA) injected by seed wave with degenerate frequency but orthogonal polarization.

The relationship between atomic dipole amplitude-squared squeezing and field amplitude-squared squeezing are also discussed.

Based on the fidelity conclusions of employing two-mode squeezed vacuum state for the entangled channel to teleport coherent state, continuous-variable quantum teleportation employing bright two-mode squeezed state for the entangled channel was studied.

When the light field was initially in the coherent state and the atom was in the excited state,the effect of amplitude-squared squeezing of light field in the nonliner model containing time was discussed.

The superposition states, which are composed of q-vacuum state and q-coherent state, are presented, and their amplitude-squared squeezing properties are disscused.

Their amplitude-squared squeezing effect, orthonormalized property, unitary property and completeness relations are discussed.