Twin-field protocols: Towards intercity quantum key distribution without quantum repeaters

Yin, Zhen-Qiang; Lu, Feng-Yu; Teng, Jie; Wang, Shuang; Chen, Wei; Guo, Guang‐Can; Han, Zheng‐Fu

doi:10.1016/j.fmre.2020.11.001

Cited by 29 publications

(11 citation statements)

References 19 publications

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“…Demonstrations of advanced QKD protocols: Previous studies of QKD demonstrations with integrated photonic chips were mostly based on classic protocols like BB84 or MDI. In the future, we should pay attention to combinations of integration technologies and cutting-edge QKD protocols, such as the recently proposed twin-field QKD [ 199 , 200 ], which can break through the PLOB bound [ 201 ], as well as its derivative protocols like phase-matching QKD [ 202 ], sending-or-not-sending [ 203 ], and no-phase-postelection protocols [ 204 ].…”

Section: Conclusion and Outlookmentioning

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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Section: Conclusion and Outlookmentioning

confidence: 99%

Advances in Chip-Based Quantum Key Distribution

Liu

Huang

et al. 2022

Entropy

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“…Continuous-variable QKD (CV-QKD) (Su et al, 2009;Diamanti and Leverrier, 2015;Guo et al, 2021;Su et al, 2022;Zhao et al, 2022) is an important direction of QKD, which encodes keys in continuous degrees of freedom. Another notable choice is to encode keys in discrete degrees of freedom on single photon, which is called discrete-variable QKD (Yin et al, 2021;Xie et al, 2022;Zeng et al, 2022). In general, CV-QKD has advantages in experimental implementation (Karinou et al, 2018).…”

Section: Open Access Edited Bymentioning

confidence: 99%

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Liu

Li²,

Liu³

et al. 2022

Front. Quantum Sci. Technol.

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Continuous-variable quantum key distribution offers simple, stable and easy-to-implement key distribution systems. The discrete modulation scheme further reduces the technical difficulty. The main regret is that the security of discrete modulation schemes has not been sufficiently demonstrated. Schemes with different signal state distributions use various physical conditions to obtain the key rate formula, resulting in different security levels, computation complexities and implementation difficulties. Therefore, a relatively systematic and logically consistent security proof against most general attacks is worth exploring. On the other hand, extending the discrete modulation scheme and its variants to different applications, such as satellite-to-earth communication, can further activate and advance this field. Here, we briefly review the achievements that have been made in discrete-modulated continuous-variable quantum key distribution, and openly discuss some issues worthy of further research.

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“…Quantum key distribution can distribute secure keys between the sender and the receiver, which was proposed in 1984 [1]. Quantum key distribution has been widely investigated in both theory and experiment [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. QSDC allows the message sender to directly transmit secret messages to the receiver without keys .…”

Section: Introductionmentioning

confidence: 99%

Device-independent quantum secure direct communication with single photon sources

Zhou,

Xu,

Zhong

et al. 2023

Preprint

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Quantum secure direct communication (QSDC) can directly transmit secrete messages through quantum channel. Device-independent (DI) QSDC can guarantee the communication security relying only on the observation of the Bell inequality violation, but not on any detailed description or trust of the inner workings of users' devices. In the paper, we propose a DI-QSDC protocol with practical high-efficient single photon sources. The communication parties construct the entanglement channel from single photons by adopting the heralded architecture, which makes the message leakage rate independent of the photon transmission loss. The secure communication distance and the practical communication efficiency of the current DI-QSDC protocol are about 6 times and 600 times of those in the original DI-QSDC protocol. Combining with the entanglement purification, the parties can construct the nearly perfect entanglement channel and completely eliminate the message leakage. This DI-QSDC protocol may have important application in future quantum communication field.

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Twin-field protocols: Towards intercity quantum key distribution without quantum repeaters

Cited by 29 publications

References 19 publications

Advances in Chip-Based Quantum Key Distribution

Advances in Chip-Based Quantum Key Distribution

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Device-independent quantum secure direct communication with single photon sources

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