A study of polarization compensation for quantum networks

EPJ Quantum Technology - Tập 10 - Trang 1-11 - 2023
Matej Peranić1, Marcus Clark2,3, Rui Wang4, Sima Bahrani4, Obada Alia4, Sören Wengerowsky5, Anton Radman1, Martin Lončarić1, Mario Stipčević1, John Rarity2, Reza Nejabati4, Siddarth Koduru Joshi2
1Photonics and Quantum Optics Research Unit, Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute, Zagreb, Croatia
2Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Bristol, United Kingdom
3Quantum Engineering Centre of Doctoral Training, NSQI, University of Bristol, Bristol, United Kingdom
4High Performance Networks Group, School of Computer Science, Electrical & Electronic Engineering and Engineering Maths (SCEEM), University of Bristol, Bristol, United Kingdom
5ICFO – Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels (Barcelona), Spain

Tóm tắt

The information-theoretic unconditional security offered by quantum key distribution has spurred the development of larger quantum communication networks. However, as these networks grow so does the strong need to reduce complexity and overheads. Polarization-based entanglement distribution networks are a promising approach due to their scalability and no need for trusted nodes. Nevertheless, they are only viable if the birefringence of all-optical distribution fibres in the network is compensated to preserve the polarization-based quantum state. The brute force approach would require a few hundred fibre polarization controllers for even a moderately sized network. Instead, we propose and investigate four different realizations of polarization compensation schemes that can be used in quantum networks. We compare them based on the type of reference signals, complexity, effort, level of disruption to network operations and performance on a four-user quantum network.

Tài liệu tham khảo

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EPJ Quantum Technology

Tập 10

1-11

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