Efficient Quantum Controlled Teleportation of an Arbitrary Three-Qubit State Using Two GHZ Entangled States and One Bell Entangled State

Abstract

Controlled quantum teleportation schemes require the existence of a third party acting as a teleportation controller, so that without its cooperation, quantum information of the unknown state cannot be transmitted. Here, we propose a new controlled quantum teleportation scheme to perfectly transmit an arbitrary entangled three-qubit state. In this scheme, quantum information of unknown three-qubit arbitrary state is transmitted from Alice, the sender to Bob, the remote receiver via a quantum channel consisting of two GHZ entangled states and a Bell entangled state under the supervision of Charlie, the controller. Bob can then recover the desired three-qubit arbitrary state by performing appropriate unitary Pauli transformations, and we find that our protocol works perfectly. This scheme could be quite easily extended to accurately teleport an unknown N-qubit state from Alice to Bob under Charlie’s control, using (N − 1) GHZ entangled states and a Bell entangled state.