Multi-party bidirectional teleportation

Abstract In this contribution, a three-party bidirectional teleportation scheme is suggested, where the users initially share a maximally entangled three qubits state of the G H Z type. In this proposed scheme, it is assumed that each user has the unknown state to be teleported, a trigger state and two storage states. Any two members can teleport unknown information bidirectionally by the help of the third member who plays the role of a mediator. There are series of local operations and measurements are needed to perform the teleportation process. The maximization/minimization of the fidelity of the teleported state depends on the teleported information (classical/quantum), the trigger’s states of the receiver and the mediator. The phase angles of all states could be used as control parameters to improve the fidelity of the teleported state. The possibility of teleportating classical information is much better than teleportaiting quantum information. The possibility of generalizing this protocol to N users as members of quantum network which consists of n qubits of G H Z is discussed.

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