High-dimensional Encoding In The Round-Robin Differential-Phase-Shift Protocol

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High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol PlatoBlockchain Data Intelligence. Vertical Search. Ai.

Mikka Stasiuk^1,2, Felix Hufnagel^3,1, Xiaoqin Gao^3,1, Aaron Z. Goldberg^1,3, Frédéric Bouchard¹, Ebrahim Karimi^3,1, and Khabat Heshami^1,3

¹National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
²Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, N2L3G1 Waterloo, Ontario, Canada
³Nexus for Quantum Technologies, University of Ottawa, Ottawa, K1N 6N5, ON, Canada

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Abstract

In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical security considerations. The round-robin differential phase shift protocol (RRDPS), falling in the family of differential phase shift protocols, was introduced to remove restrictions on the security analysis, such as the requirement to monitor signal disturbances, improving its practicality in implementations. While the RRDPS protocol requires the encoding of single photons in high-dimensional quantum states, at most, only one bit of secret key is distributed per sifted photon. However, another family of protocols, namely high-dimensional (HD) QKD, enlarges the encoding alphabet, allowing single photons to carry more than one bit of secret key each. The high-dimensional BB84 protocol exemplifies the potential benefits of such an encoding scheme, such as larger key rates and higher noise tolerance. Here, we devise an approach to extend the RRDPS QKD to an arbitrarily large encoding alphabet and explore the security consequences. We demonstrate our new framework with a proof-of-concept experiment and show that it can adapt to various experimental conditions by optimizing the protocol parameters. Our approach offers insight into bridging the gap between seemingly incompatible quantum communication schemes by leveraging the unique approaches to information encoding of both HD and DPS QKD.

► BibTeX data

@article{Stasiuk2023highdimensional, doi = {10.22331/q-2023-12-14-1207}, url = {https://doi.org/10.22331/q-2023-12-14-1207}, title = {High-dimensional {E}ncoding in the {R}ound-{R}obin {D}ifferential-{P}hase-{S}hift {P}rotocol}, author = {Stasiuk, Mikka and Hufnagel, Felix and Gao, Xiaoqin and Goldberg, Aaron Z. and Bouchard, Fr{‘{e}}d{‘{e}}ric and Karimi, Ebrahim and Heshami, Khabat}, journal = {{Quantum}}, issn = {2521-327X}, publisher = {{Verein zur F{“{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}}, volume = {7}, pages = {1207}, month = dec, year = {2023}<br /> }

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Cited by

[1] Frank Schmidt, Daniel Miller, and Peter van Loock, “Error-corrected quantum repeaters with GKP qudits”, arXiv:2303.16034, (2023).

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This Paper is published in Quantum under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Copyright remains with the original copyright holders such as the authors or their institutions.

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Source: https://quantum-journal.org/papers/q-2023-12-14-1207/

Time Stamp: December 14, 2023

Time Stamp: Oct 24, 2023

Hybridized Methods for Quantum Simulation in the Interaction Picture

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Source Node: 1626946

Time Stamp: Aug 17, 2022

High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol

Republished By Plato

Abstract

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