Network Coding Quantum Communications via Multi-step Quantum Teleportation

Zhihua Zhang, Yuyang Sang

Tao Shang, Gang Du, Jianwei Liu

Zhigang Chen, Dazu Huang, Ying Guo

Motivated by multi-step quantum teleportation of single-qubit states and two-qubit states with entanglement swapping, we present a small scale quantum network communication scheme based on entanglement of Bell states. In this scheme, it contains certain number of single-qubit quantum source nodes that teleport unknown quantum states to other nodes in the network in the multi-teleport fashion where every intermediate node can pass on any of its received quantum information to others via multi-step quantum teleportation. It makes legal nodes more convenient than any other previous schemes to transmit unknown quantum states to unknown participants in practical applications. The security of this scheme is based on the securely-shared quantum channels between all nodes.

Michael Reck, Klaus Mattle, Harald Weinfurter +2 more

Bei Zeng, Di Zhou, Zhuoqun Xu +1 more

A protocol of quantum communication is proposed in terms of the multi-qubit quantum teleportation through cluster states (Phys. Rev. Lett. \textbf{86}, 910 (2001)). Extending the cluster state based quantum teleportation on the basic unit of three qubits (or qudits), the corresponding multi-qubit network is constructed for both the qubits and qudits (multi-level) cases. The classical information costs to complete this communication task is also analyzed. It is also shown that this quantum communication protocol can be implemented in the spin-spin system on lattices.

Tao Shang, Ran Liu, Chengran Fang +1 more