Efficient many-party controlled teleportation of multi-qubit quantum information via entanglement

摘要

We present a way to teleport multi-qubit quantum information from a sender toa distant receiver via the control of many agents in a network. We show thatthe original state of each qubit can be restored by the receiver as long as allthe agents collaborate. However, even if one agent does not cooperate, thereceiver can not fully recover the original state of each qubit. The methodoperates essentially through entangling quantum information duringteleportation, in such a way that the required auxiliary qubit resources, localoperation, and classical communication are considerably reduced for the presentpurpose.