Performance of Rotation‐Symmetric Bosonic Codes in a Quantum Repeater Network

Li P, Dias J, Munro WJ, van Loock P, Nemoto K, Lo Piparo N (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Advanced Quantum Technologies Wiley

Book Volume: 7

Issue: 6

DOI: 10.1002/qute.202300252

Abstract

Quantum error correction codes based on continuous variables play an important role for the implementation of quantum communication systems. A natural application of such codes occurs within quantum repeater systems which are used to combat severe channel losses and local gate errors. In particular, channel loss drastically reduces the distance of communication between remote users. Here, a cavity-quantum electrodynamics (QED) based repeater scheme is considered to address the losses in the quantum channel. This repeater scheme relies on the transmission of a specific class of rotationally invariant error-correcting codes. Several rotation-symmetric bosonic codes (RSBCs) are compared for encoding the initial states of two remote users connected by a quantum repeater network against the convention of the cat codes and the performance of the system is quantified by using the secret key rate. In particular, the number of stations required to exchange a secret key over a fixed distance is determined and establish the resource overhead. For higher-loss codes, the results show that a secret key rate (SKR) value of 0.01 bit per channel use can be achieved at a distance of 10000 km, with an elementary distance of 1.3 km.

Authors with CRIS profile

Peter van Loock

Additional Organisation(s)

Sonderforschungsbereich/Transregio 306/1: Quantenkooperativität von Licht und Materie - QuCoLiMa

Involved external institutions

Okinawa Institute of Science and Technology (OIST) / 沖縄科学技術大学院大学 JP Japan (JP) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Li, P., Dias, J., Munro, W.J., van Loock, P., Nemoto, K., & Lo Piparo, N. (2024). Performance of Rotation‐Symmetric Bosonic Codes in a Quantum Repeater Network. Advanced Quantum Technologies, 7. https://doi.org/10.1002/qute.202300252

MLA:

Li, Pei‐Zhe, et al. "Performance of Rotation‐Symmetric Bosonic Codes in a Quantum Repeater Network." Advanced Quantum Technologies 7 (2024).

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