Metropolitan quantum key distribution with silicon photonics

By Darius Bunandar, A. Lentine, Catherine Lee, H. Cai, C. Long, Nicholas A. Boynton, N. Martinez, C. DeRose, Changchen Chen, M. Grein and 9 more. 2017

163 citations recorded by the source corpus.

Photonic integrated circuits (PICs) provide a compact and stable platform for quantum photonics. Here we demonstrate a silicon photonics quantum key distribution (QKD) transmitter in the first high-speed polarization-based QKD field tests. The systems reach composable secret key rates of 950 kbps in a local test (on a 103.6-m fiber with a total emulated loss of 9.2 dB) and 106 kbps in an intercity metropolitan test (on a 43-km fiber with 16.4 dB loss). Our results represent the highest secret key generation rate for polarization-based QKD experiments at a standard telecom wavelength and demonstrate PICs as a promising, scalable resource for future formation of metropolitan quantum-secure communications networks.

Subfields: Artificial Intelligence, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/14992247769f5b9677ff17676ca77f17e9df96c6

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Citations in the corpus

Advances in quantum cryptography (2019, unknown): “The amount of complexity that can be achieved with PICs has been shown to enable practical implementation of wavelength multiplexing for higher secret key rates [281, 282], multi-protocol operations for flexibility [283], and additional monitoring and compensation capabilities against timing and pol”
Integrated photonic quantum technologies (2019, methodology): “ack lasers, a balanced MMI beamsplitter and two photodetectors for heterodyne detection. Figure reproduced from: a, ref. [37] , Macmillan Publishers Ltd; b, ref. [73], OSA; c, ref. [65], OSA; d, ref. [67], APS; e, ref. [38], OSA. Fig. 4 Quantum information processing and quantum computing with integ”
2022 Roadmap on integrated quantum photonics (2021, background): “These SPDs work in the telecom bands and operate with moderate cooling near room-temperature and can be deployed in QKD chip-based transceivers that do not rely on high SPD efficiency [214].”
End-to-end capacities of a quantum communication network (2019, background): “Recently, we have also witnessed the deployment of high-rate optical-based secure quantum networks 11,12 .”