Quantum Secure Direct Intercommunication with Superdense Coding and Entanglement Swapping

摘要

A quantum secure direct intercommunication scheme is proposed to exchange directly the communicators'secret messages by making use of swapping entanglement of Bell states.It has great capacity to distribute the secretmessages since these messages have been imposed on high-dimensional Bell states via the local unitary operations withsuperdense coding.The security is ensured by the secure transmission of the travel sequences and the application ofentanglement swapping.