Teleportation of an Arbitrary Multipartite GHZ-Class State by One EPR Pair
Yahong Wang, Chang-shui Yu, He‐Shan Song · Chinese Physics Letters · 2006
We present a scheme for perfectly teleporting an arbitrary and unknown N -particle GHZ-class state from a sender to a receiver. We just need one quantum channel composed of two or three particles in the maximally entangled state. The sender performs one Bell-state measurement on two of her particles and N −1 Hadamard operations and N −1 von Neumann measurements on the rest N −1 particles. The receiver adopts one corresponding unitary transformation on his particles shared with the sender. After that, the receiver can obtain the original N -particle GHZ-class state by introducing N −1 ancillary particles and carrying out N −1 controlled-NOT operations. We also generalize the scheme to the case of controlled teleportation.