Unconditional teleportation of continuous-variable entanglement

Unconditional teleportation of continuous-variable entanglement

van Loock, P. and Braunstein, S.L. Physical Review A, 61, 010302/1-4 (2000) (PDF)

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.