Path-encoded high-dimensional quantum communication over a 2 km multicore fiber

Beatrice Da Lio; Daniele Cozzolino; Nicola Biagi; Yunhong Ding; Karsten Rottwitt; Alessandro Zavatta; Davide Bacco; Leif K. Oxenløwe

Path-encoded high-dimensional quantum communication over a 2 km multicore fiber

Quantum Physics 2021-03-11 v1

Authors: Beatrice Da Lio , Daniele Cozzolino , Nicola Biagi , Yunhong Ding , Karsten Rottwitt , Alessandro Zavatta , Davide Bacco , Leif K. Oxenløwe

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Abstract

Quantum key distribution (QKD) protocols based on high-dimensional quantum states have shown the route to increase the key rate generation while benefiting of enhanced error tolerance, thus overcoming the limitations of two-dimensional QKD protocols. Nonetheless, the reliable transmission through fiber links of high-dimensional quantum states remains an open challenge that must be addressed to boost their application. Here, we demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states. Leveraging on a phase-locked loop system, a stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.

Keywords

quantum key distribution quantum networks quantum cryptography

Cite

@article{arxiv.2103.05992,
  title  = {Path-encoded high-dimensional quantum communication over a 2 km multicore fiber},
  author = {Beatrice Da Lio and Daniele Cozzolino and Nicola Biagi and Yunhong Ding and Karsten Rottwitt and Alessandro Zavatta and Davide Bacco and Leif K. Oxenløwe},
  journal= {arXiv preprint arXiv:2103.05992},
  year   = {2021}
}

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to appear in npj Quantum Information

Path-encoded high-dimensional quantum communication over a 2 km multicore fiber

Abstract

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