https://doi.org/10.1140/epjd/s10053-022-00491-7
Regular Article - Quantum Information
Superdense coding based on intraparticle entanglement states
1
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, 211106, Nanjing, China
2
Academy of Astronautics, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, China
3
Institute of Microscale Optoelectronics, Shenzhen University, 518060, Shenzhen, China
4
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, 210044, Nanjing, China
Received:
8
October
2021
Accepted:
31
August
2022
Published online:
26
September
2022
High channel capacity always plays an important role in quantum communication. Dense coding is an effective way to improve channel capacity, whose core idea is to apply as few particles as possible to carry information. Quantum entanglement exists not only between multiple particles but also in various degrees of freedom of a single-particle (intraparticle entanglement). Compared with the former (entanglement among multi-particles), firstly, the latter (intraparticle entanglement) can enable more bits of information to be transmitted in one-time communication by utilizing more degrees of freedom of single-particle. Secondly, the latter is more robust than the former. Thus, in this paper, based on the current experiment technology level, a scheme is designed to encode, transmit, and process 3 bits of classical information by applying the intraparticle entanglement state of a single-photon with three degrees of freedom in theory. Based on the literature survey, this scheme reaches the level at which a single-photon currently carries the most information with good security and robustness, and this work reveals a good idea for realizing superdense coding.
Copyright comment Springer Nature or its licensor 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.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor 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.
