Multipartite entanglement for continuous variables: A quantum teleportation network

Phys Rev Lett. 2000 Apr 10;84(15):3482-5. doi: 10.1103/PhysRevLett.84.3482.


We show that one single-mode squeezed state distributed among N parties using linear optics suffices to produce a truly N-partite entangled state for any nonzero squeezing and arbitrarily many parties. From this N-partite entangled state, via quadrature measurements of N-2 modes, bipartite entanglement between any two of the N parties can be "distilled," which enables quantum teleportation with an experimentally determinable fidelity better than could be achieved in any classical scheme.