https://doi.org/10.1140/epjp/s13360-023-04532-x
Regular Article
Experimental simulation of the quantum secure direct communication using MATLAB and Simulink
QuNu Labs Pvt. Ltd., M. G. Road, 560025, Bengaluru, Karnataka, India
Received:
9
August
2023
Accepted:
1
October
2023
Published online:
14
October
2023
Quantum secure direct communication is an important mode of quantum communication in which secret messages are securely communicated directly over a quantum channel without the requirement of symmetric key generation at first between the two nodes. Quantum secure direct communication is also a basic cryptographic primitive for constructing other quantum communication tasks, such as quantum authentication and quantum dialog. Here, we report the first detailed experimental simulation of quantum secure direct communication based on the modified version of the DL04 protocol for the phase degree of freedom and equipped with single-photon frequency coding that explicitly demonstrated block transmission. In our experiment simulator, we demonstrated both the noiseless and noisy channel versions of the protocol. In the noisy channel version, we have used 16 different aperiodic frequency channels, equivalent to a nibble of four-bit binary numbers for direct information transmission. We have explicitly demonstrated the transmission of the word ’QNu’ using block frequency at the Bob node and decoding at the Alice node. The experiment simulator firmly demonstrates the feasibility of quantum secure direct communication in the presence of noise and loss.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
