Journal
NPJ QUANTUM INFORMATION
Volume 5, Issue -, Pages -Publisher
SPRINGERNATURE
DOI: 10.1038/s41534-019-0175-6
Keywords
-
Categories
Funding
- PRESTO, JST [JPMJPR1861]
- Spanish Ministry of Economy and Competitiveness (MINECO)
- Fondo Europeo de Desarrollo Regional (FEDER) [TEC2014-54898-R, TEC2017-88243-R]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [675662]
- US Office of Naval Research
- NSERC
- CFI
- ORF
- MITACS
- Huawei Technologies Canada Co., Ltd
- Royal Bank of Canada
Ask authors/readers for more resources
Twin-field (TF) quantum key distribution (QKD) was conjectured to beat the private capacity of a point-to-point QKD link by using single-photon interference in a central measuring station. This remarkable conjecture has recently triggered an intense research activity to prove its security. Here, we introduce a TF-type QKD protocol which is conceptually simpler than the original proposal. It relies on the pre-selection of a global phase, instead of the post-selection of a global phase, which significantly simplifies its security analysis and is arguably less demanding experimentally. We demonstrate that the secure key rate of our protocol has a square-root improvement over the point-to-point private capacity, as conjectured by the original TF QKD.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available