Quantum secure direct communication network with hyperentanglement
2014
We propose a quantum secure direct communication protocol with entanglement swapping and hyperentanglement.Any two users, Alice and Bob, can communicate with each other in a quantum network, even though there is no direct quantum channel between them. The trust center, Trent, who provides a quantum channel to link them by performing entanglement swapping, cannot eavesdrop on their communication. This protocol provides a high channel capacity because it uses hyperentanglement, which can be generated using a beta barium borate crystal.
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