Experimental Quantum Key Distribution with Integrated Silicon Photonics and Electronics

Zhu, Chenxi; Chen, Zhao-Yuan; Li, Yang; Wang, Xinzhe; Wang, Chao-Ze; Zhu, Yulong; Liang, Futian; Cai, Wen-Qi; Jin, G.; Liao, Sheng-Kai; Peng, Cheng-Zhi

doi:10.1103/physrevapplied.17.064034

Cited by 15 publications

(5 citation statements)

References 61 publications

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“…In addition, a lower modulation voltage drastically reduces the power consumption of modulation, which can allow for commercial systems with more sustainable power requirements. The low V π of 4 V demonstrated here compares well to previous silicon-based QKD modulators 10,11,20,21 , while the strong phase modulation efficiency of the EOPMs allows this to be achieved with a compact modulator that keeps optical losses low.…”

Section: Discussionsupporting

confidence: 57%

“…Miniaturisation of the optical components into photonic integrated circuits (PICs) promises to increase the manufacturability of QKD systems to a point where widespread adoption becomes more feasible. In recent years, these 'on-chip' QKD systems have been demonstrated in a wide variety of formats, such as time-bin encoding [8][9][10][11][12][13][14][15][16] , polarisation encoding [17][18][19][20][21][22][23] , free-space channel 22 , measurementdevice independent QKD 13,19,20 and continuous-variable QKD 24 . Recent efforts have achieved milestones such as integrated detectors 15 , a complete real-time chip-based QKD system based on pluggable modules 14 , combined electronic and photonic integration 16,21 , and an integrated transmitter used in the demonstration of the highest QKD secure key rate to date 25 .…”

Section: Introductionmentioning

confidence: 99%

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A hybrid integrated quantum key distribution transceiver chip

Dolphin,

Paraïso,

et al. 2023

npj Quantum Inf

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Quantum photonic technologies, such as quantum key distribution, are already benefiting greatly from the rise of integrated photonics. However, the flexibility in design of these systems is often restricted by the properties of the integration material platforms. Here, we overcome this choice by using hybrid integration of ultra-low-loss silicon nitride waveguides with indium phosphide electro-optic modulators to produce high-performance quantum key distribution transceiver chips. Access to the best properties of both materials allows us to achieve active encoding and decoding of photonic qubits on-chip at GHz speeds and with sub-1% quantum bit error rates over long fibre distances. We demonstrate bidirectional secure bit rates of 1.82 Mbps over 10 dB channel attenuation and positive secure key rates out to 250 km of fibre. The results support the imminent utility of hybrid integration for quantum photonic circuits and the wider field of photonics.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

A hybrid integrated quantum key distribution transceiver chip

Dolphin,

Paraïso,

et al. 2023

npj Quantum Inf

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show abstract

“…In 2022, researchers from the University of Science and Technology of China proposed a prototype QKD transmitter by developing integrated silicon photonics and electronics technologies. [82] Researchers at the Institute of Semiconductors, Chinese Academy of Sciences proposed a simplified and reconfigurable silicon photonic encoder. [83] Researchers at the USTC used silica AMZI integrated with Faraday mirrors to improve the optimal interferometric antipolarization performance, [84] achieving a secure key rate of 1.34 Mbps at 50 km.…”

Section: Advances In Chip-based Qkd Researchmentioning

confidence: 99%

Research progress in quantum key distribution

Zhang 张,

Wu 吴,

Cui 崔

et al. 2023

Chinese Phys. B

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uantum Key Distribution (QKD) is a sophisticated method for securing information by leveraging the principles of quantum mechanics. Its objective is to establish a confidential key between authorized partners who are connected via both a quantum channel and a classical authentication channel. This paper presents a comprehensive overview of QKD protocols, chip-based QKD systems, quantum light sources, quantum detectors, fiber-based QKD networks, space-based QKD systems, as well as the applications and future prospects of QKD technology.

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“…The Si-based integrated chip provided a phase-stable platform for high-speed QKD. Other qubit-based QKD demonstrations using Si-based implementations include works carried out by Huawei [ 97 ], the Toshiba Cambridge Institute [ 98 ], Sun Yat-sen University [ 99 ], the University of Padua [ 100 ], IOS-CAS [ 103 , 105 ] and the University of Science and Technology of China [ 104 , 105 ].…”

Section: Qkd Demonstrationmentioning

confidence: 99%

Advances in Chip-Based Quantum Key Distribution

Liu

Huang

et al. 2022

Entropy

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Quantum key distribution (QKD), guaranteed by the principles of quantum mechanics, is one of the most promising solutions for the future of secure communication. Integrated quantum photonics provides a stable, compact, and robust platform for the implementation of complex photonic circuits amenable to mass manufacture, and also allows for the generation, detection, and processing of quantum states of light at a growing system’s scale, functionality, and complexity. Integrated quantum photonics provides a compelling technology for the integration of QKD systems. In this review, we summarize the advances in integrated QKD systems, including integrated photon sources, detectors, and encoding and decoding components for QKD implements. Complete demonstrations of various QKD schemes based on integrated photonic chips are also discussed.

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Experimental Quantum Key Distribution with Integrated Silicon Photonics and Electronics

Cited by 15 publications

References 61 publications

A hybrid integrated quantum key distribution transceiver chip

A hybrid integrated quantum key distribution transceiver chip

Research progress in quantum key distribution

Advances in Chip-Based Quantum Key Distribution

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