Unconditional teleportation of continuous-variable entanglement - art. no.010302

We give a protocol and criteria for demonstrating unconditional teleportati on of continuous-variable entanglement (i.e., entanglement swapping). The i nitial entangled states are produced with squeezed light and linear optics. We show that any nonzero entanglement (any nonzero squeezing) in both of t wo entanglement sources is sufficient for entanglement swapping to occur. T n fact, realization of continuous-variable entanglement swapping is possibl e using only two single-mode squeezed states.