Quantum teleportation of a N-qubit entangled state by using a (N+1)-qubit duster state

Quantum teleportation protocols are widely employed for secure transfer of quantum states to away part. In this paper, we present a new scheme for teleporting a N-qubit entangled state via a (N + 1)-qubit cluster state as quantum channel. In this scheme, the sender (Alice) performs a von Neumann measurement on her basis and announces the result to the receiver (Bob), let him to recover the original state by affecting unitary operator on his state. Here, firstly, we present our general scheme for teleportation of a N-qubit entangled state by using a (N + 1)-qubit cluster state; then, the proposed scheme is examined by a simple example in which a 6-qubit entangled state is teleported by employing the proposed scheme. Finally, we analyze the efficiency of the scheme and indicate its advantages.