ABSTRACT:
We give a protocol and criteria for demonstrating unconditional
teleportation of continuous-variable entanglement (i.e., entanglement
swapping). The initial entangled states are produced with squeezed
light and linear optics. We show that any nonzero entanglement (any
nonzero squeezing) in both of two entanglement sources is sufficient
for entanglement swapping to occur. In fact, realization of
continuous-variable entanglement swapping is possible using only *two*
single-mode squeezed states.