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arXiv:2402.14043 · Quantum Information Processing

Hybrid multi-directional quantum communication protocol

Mitali Sisodia, Manoj Kumar Mandal, Binayak Samadder Choudhury

Published Aug 30, 2024• 4 citations
arXivHTMLPDF
DOI
10.1007/s11128-024-04516-5

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Quantum secure direct communication (QSDC) can transmit secret messages without keys, making it an important branch of quantum communication. We present a hybrid entanglement-based quantum secure direct communication (HE-QSDC) protocol with simple linear optical elements, combining the benefits of both continuous variables (CV) and discrete variables (DV) encoding. We analyze the security and find that the QSDC protocol has a positive security capacity when the bit error rate is less than 0.073. Compared with previous DV QSDC protocols, our protocol has higher communication efficiency due to performing nearly deterministic Bell-state measurement. On the other hand, compared with CV QSDC protocol, this protocol has higher fidelity with large α. Based on these advantages, our protocol may provide an alternative approach to realize secure communication.