Confirming entanglement in continuous variable quantum teleportation

Abstract

The teleportation of the signal beam of a parametric amplifier is considered, and its entanglement with the idler beam before and after the teleportation process is computed. A criterion based on homodyne measurements is proposed to discount purely classical effects, and it is suggested that the preservation of the Einstein-Podolsky-Rosen correlations during teleportation may be verified experimentally.