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Long-distance quantum key distribution (QKD) has long time seriously relied on trusted relay or quantum repeater, which either has security threat or is far from practical implementation. Recently, a solution called twin-field (TF) QKD and…

Quantum Physics · Physics 2019-11-21 Hua-Lei Yin , Zeng-Bing Chen

Quantum key distribution (QKD) offers a reliable solution to communication problems that require long-term data security. For its widespread use, however, the rate and reach of QKD systems must be improved. Twin-field (TF) QKD is a step…

Twin-Field Quantum Key Distribution(TF-QKD) protocol and its variants, such as Phase-Matching QKD(PM-QKD), sending or not QKD(SNS-QKD) and No Phase Post-Selection TF-QKD(NPP-TFQKD), are very promising for long-distance applications.…

Twin-Field (TF) quantum key distribution (QKD) represents a novel QKD approach whose principal merit is to beat the point-to-point private capacity of a lossy quantum channel, thanks to performing single-photon interference in an untrusted…

Quantum Physics · Physics 2020-07-14 Federico Grasselli , Marcos Curty

Twin-Field (TF) quantum key distribution (QKD) is a major candidate to be the new benchmark for far-distance QKD implementations, since its secret key rate can overcome the repeaterless bound by means of a simple interferometric…

Quantum Physics · Physics 2019-11-15 Federico Grasselli , Alvaro Navarrete , Marcos Curty

Twin-Field quantum key distribution (TF-QKD) and its variants, e.g. Phase-Matching QKD, Sending-or-not-sending QKD, and No Phase Post-Selection TFQKD promise high key rates at long distance to beat the rate distance limit without a…

Quantum key distribution (QKD) can help two distant peers to share secret key bits, whose security is guaranteed by the law of physics. In practice, the secret key rate of a QKD protocol is always lowered with the increasing of channel…

The BB84 quantum key distribution (QKD) combined with decoy-state method is currently the most practical protocol, which has been proved secure against general attacks in the finite-key regime. Thereinto, statistical fluctuation analysis…

Quantum Physics · Physics 2021-04-01 Hua-Lei Yin , Min-Gang Zhou , Jie Gu , Yuan-Mei Xie , Yu-Shuo Lu , Zeng-Bing Chen

Thanks to the single-photon interference at a third untrusted party, the twin-field quantun key distribution (TF-QKD) protocol and its variants can beat the well-known rate-loss bound without quantum repeaters, and related experiments have…

Quantum Physics · Physics 2021-01-06 Chun-Mei Zhang , Yi-Wei Xu , Rong Wang , Qin Wang

Twin-field (TF) quantum key distribution (QKD) can overcome fundamental secret-key-rate bounds on point-to-point QKD links, allowing us to reach longer distances than ever before. Since its introduction, several TF-QKD variants have been…

Quantum Physics · Physics 2022-12-06 Guillermo Currás-Lorenzo , Lewis Wooltorton , Mohsen Razavi

Compared with two-level quantum key distribution (QKD), highdimensional QKD enable two distant parties to share a secret key at a higher rate. We provide a finite-key security analysis for the recently proposed practical highdimensional…

Quantum Physics · Physics 2016-06-08 Haize Bao , Wansu Bao , Yang Wang , Chun Zhou , Ruike Chen

Twin-field quantum key distribution (TF-QKD) and its variants can overcome the fundamental rate-distance limit of QKD which has been demonstrated in the laboratory and field while their physical implementations with side channels remains to…

Quantum Physics · Physics 2021-09-08 Yi-Fei Lu , Mu-Sheng Jiang , Yang Wang , Xiao-Xu Zhang , Fan Liu , Chun Zhou , Hong-Wei Li , Wan-Su Bao

The Sending-or-Not-Sending protocol of the twin-field quantum key distribution (TF-QKD) has its advantage of unconditional security proof under any coherent attack and fault tolerance to large misalignment error. So far this is the only…

Quantum Physics · Physics 2019-09-02 Cong Jiang , Zong-Wen Yu , Xiao-Long Hu , Xiang-Bin Wang

Twin-Field Quantum Key Distribution (TF-QKD) has emerged as a potential protocol for long distance secure communication, overcoming the rate-distance limitations of conventional quantum key distribution without requiring trusted repeaters.…

Quantum Physics · Physics 2025-10-31 Syed M. Arslan , Syed Shahmir , Noureldin Mohammad , Saif Al-Kuwari , Muataz Alhussein

Twin-field quantum key distribution (TF-QKD) and its variant protocols are highly attractive due to the advantage of overcoming the rate-loss limit for secret key rates of point-to-point QKD protocols. For variations of TF-QKD, the key…

Quantum key distribution(QKD) allows two remote parties to share information-theoretic secret keys. Many QKD protocols assume the phase of encoding state can be continuous randomized from 0 to 2 pi, which, however, may be questionable in…

Quantum Physics · Physics 2023-02-15 Rui Qiang Wang , Zhen Qiang yin , Rong Wang , Shuang Wang , Wei Chen , Guang can Guo , Zhen fu Han

Twin-field quantum key distribution (TF-QKD) overcomes the linear rate-loss limit, which promises a boost of secure key rate over long distance. However, the complexity of eliminating the frequency differences between the independent laser…

Twin-field quantum key distribution (TF-QKD) promises ultra-long secure key distribution which surpasses the rate distance limit and can reduce the number of the trusted nodes in long-haul quantum network. Tremendous efforts have been made…

The twin-field (TF) quantum key distribution (QKD) protocol and its variants are highly attractive because they can beat the well-known rate-loss limit (i.e., the PLOB bound) for QKD protocols without quantum repeaters. In this paper, we…

Quantum Physics · Physics 2019-09-11 X. Zhong , J. Hu , M. Curty , L. Qian , H. -K. Lo

Twin-field (TF) quantum key distribution (QKD) is highly attractive because it can beat the fundamental limit of secret key rate for point-to-point QKD without quantum repeaters. Many theoretical and experimental studies have shown the…

Quantum Physics · Physics 2021-01-29 Xiaoqing Zhong , Wenyuan Wang , Li Qian , Hoi-Kwong Lo
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