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Coding in the entanglement domain

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Abstract

Moving at the speed of light, the photon is the ideal physical support to transmit information. Polarization of a photon is the predominant quantum property used to encode information, but other encoding domains, such as the spatial-mode degree of freedom, have been considered. In this paper, we put forward the entanglement degree of freedom of a photon as an exploitable resource for encoding information in quantum cryptographic protocols. We show how classical information can be extracted from the quantum state of a photon by distinguishing between a singular, independent state and an entangled state through interferometry. We also give a direct application of our technique to quantum key distribution as a proof of concept for future quantum protocols that may use coding in the entanglement domain in combination with other degrees of freedom that are currently exploited for cryptographic purposes.

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Authors and Affiliations

  1. College of Computer Engineering and Science, Cybersecurity Center, Prince Mohammad Bin Fahd University, Al Azeziya, Eastern Province, Kingdom of Saudi Arabia

    Marius Nagy

  2. College of Computer Science and IT, Imam Abdulrahman Bin Faisal University, Dammam, Kingdom of Saudi Arabia

    Naya Nagy

  3. School of Computing, Queen’s University, Kingston, ON, Canada

    Marius Nagy

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  1. Marius Nagy
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  2. Naya Nagy
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Correspondence to Marius Nagy.

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Nagy, M., Nagy, N. Coding in the entanglement domain. Quantum Inf Process 19, 134 (2020). https://doi.org/10.1007/s11128-020-02632-6

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  • DOI: https://doi.org/10.1007/s11128-020-02632-6

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