Simple Quantum Communication Protocol Based on Bell Test

Abstract

In this paper, we propose a robust quantum communication protocol which needs Bell test only with one round classical communication. Current quantum communication protocols such as quantum dense code and quantum direct communication protocol are vulnerable to interference, and quantum key distribution protocol which have already in large scale use needs multiple rounds classical communication to remove the effects of noise. Bell test is a well-known entanglement detector and as a powerful tool to verify the quantum non-locality that the quantum correlation between two space separated objects. It has been applied in several quantum communication protocols for security check and network relay. Moreover, we found that entanglement is a valuable quantum correlation resource itself and Bell test can verify it. In our protocol, the quantum entanglement is used to establish a shared code information space between sender and receiver via the peculiar quantum correlation. The information is encoded as the position of message sequence and the receiver decodes it by a Bell Test, the maximum correlation value occurs exactly at the encoded position. The protocol completes information transmission by only one round classical communication and work well under imperfect apparatus as well. Our protocol is simple and be implemented seamlessly in existing entanglement based quantum communication protocol.