Chip-based quantum key distribution

Kwek, Leong Chuan; Cao, Lushuai; Luo, Wei; Wang, Yinxiang; Sun, Shi-Hai; Wang, Xiang-Bin; Liu, Ai Qun

doi:10.1007/s43673-021-00017-0

Cited by 142 publications

(45 citation statements)

References 54 publications

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“…The low purity of these biphotons will pose severe restrictions for many quantum applications such as boson sampling, quantum teleportation, and quantum key distribution. [26][27][28][29][30][31]. In particular, the current reported best purity under the 3 rd GVM condition is around 0.82, where the degradation is mainly caused by the phase-matching condition in PPLN [15].…”

Section: Introductionmentioning

confidence: 82%

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Cai,

Tian,

Wang

et al. 2022

Preprint

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Quantum light sources in the mid-infrared (MIR) band play an important role in many applications, such as quantum sensing, quantum imaging, and quantum communication. However, there is still a lack of high-quality quantum light sources in the MIR band, such as the spectrally pure single-photon source. In this work, we present the generation of spectrally-pure state in an optimized poled lithium niobate crystal using a metaheuristic algorithm. In particular, we adopt the particle swarm optimization algorithm to optimize the duty cycle of the poling period of the lithium niobate crystal. With our approach, the spectral purity can be improved from 0.820 to 0.998 under the third group-velocity-matched condition, and the wavelength-tunable range is from 3.0 µm to 4.0 µm for the degenerate case and 3.0 µm to 3.7 µm for the nondegenerate case. Our work paves the way for developing quantum photonic technologies at the MIR wavelength band.

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Section: Introductionmentioning

confidence: 82%

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Cai,

Tian,

Wang

et al. 2022

Preprint

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“…In particular, our ideas and methods are very easy to generalize to other QKD protocols. We expect that our work will stimulate further research to help most QKD systems run on low-power chips 63 in mobile devices 64 .…”

Section: Discussionmentioning

confidence: 97%

Neural network-based prediction of the secret-key rate of quantum key distribution

Zhou

Liu

et al. 2022

Sci Rep

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Numerical methods are widely used to calculate the secure key rate of many quantum key distribution protocols in practice, but they consume many computing resources and are too time-consuming. In this work, we take the homodyne detection discrete-modulated continuous-variable quantum key distribution (CV-QKD) as an example, and construct a neural network that can quickly predict the secure key rate based on the experimental parameters and experimental results. Compared to traditional numerical methods, the speed of the neural network is improved by several orders of magnitude. Importantly, the predicted key rates are not only highly accurate but also highly likely to be secure. This allows the secure key rate of discrete-modulated CV-QKD to be extracted in real time on a low-power platform. Furthermore, our method is versatile and can be extended to quickly calculate the complex secure key rates of various other unstructured quantum key distribution protocols.

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“…Therefore, the works on enhanced multiphoton have been resolved the issue of increasing source redundancy [129], improved the authentication procedures [121] and improved the achievable secret key rate as well as distance coverage [130]. With the emergence of quantum technology, the chip-based QKD is introduced [131]. Chip-based technology can offer small size and low energy consumption for a low cost.…”

Section: Qkd Based On Multiphotonmentioning

confidence: 99%

Quantum Key Distribution for 5G Networks: A Review, State of Art and Future Directions

2022

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In recent years, 5G networks and services become progressively popular among telecommunication providers. Simultaneously, the growth in the usage and deployment of smartphone platforms and mobile applications have been seen as phenomenal. Therefore, this paper discusses the current state of the art of 5G technology in the merger of unconditional security requirements referred to as Quantum Cryptography. The various domain of Quantum Cryptography is illustrated including the protocols available, their functionality and previous implementation in real networks. This paper further identifies research gaps covering critical aspects of how Quantum Cryptography can be realized and effectively utilized in 5G networks. These include improving the current technique in Quantum Cryptography through efficient key distribution and message sharing between users in 5G networks.

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Chip-based quantum key distribution

Cited by 142 publications

References 54 publications

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Optimized design of the lithium niobate for spectrally-pure-state generation at MIR wavelengths using metaheuristic algorithm

Neural network-based prediction of the secret-key rate of quantum key distribution

Quantum Key Distribution for 5G Networks: A Review, State of Art and Future Directions

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