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Open AccessFeature PaperArticle

Efficient High-Dimensional Quantum Key Distribution with Hybrid Encoding

1
Department of Physics, Sogang University, Seoul 04107, Korea
2
Research Institute for Basic Science, Sogang University, Seoul 04107, Korea
3
Korea Research Institute of Standards and Science, Daejeon 34113, Korea
4
Quantum Universe Center, Korea Institute for Advanced Study, Seoul 02455, Korea
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(1), 80; https://doi.org/10.3390/e21010080
Received: 26 December 2018 / Revised: 11 January 2019 / Accepted: 14 January 2019 / Published: 17 January 2019
(This article belongs to the Special Issue Entropic Uncertainty Relations and Their Applications)
We propose a schematic setup of quantum key distribution (QKD) with an improved secret key rate based on high-dimensional quantum states. Two degrees-of-freedom of a single photon, orbital angular momentum modes, and multi-path modes, are used to encode secret key information. Its practical implementation consists of optical elements that are within the reach of current technologies such as a multiport interferometer. We show that the proposed feasible protocol has improved the secret key rate with much sophistication compared to the previous 2-dimensional protocol known as the detector-device-independent QKD. View Full-Text
Keywords: quantum cryptography; quantum key distribution; high-dimensional quantum states quantum cryptography; quantum key distribution; high-dimensional quantum states
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MDPI and ACS Style

Jo, Y.; Park, H.S.; Lee, S.-W.; Son, W. Efficient High-Dimensional Quantum Key Distribution with Hybrid Encoding. Entropy 2019, 21, 80.

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