1002 km Twin-Field Quantum Key Distribution with Finite-Key Analysis
- URL: http://arxiv.org/abs/2402.00005v1
- Date: Fri, 1 Dec 2023 15:01:47 GMT
- Title: 1002 km Twin-Field Quantum Key Distribution with Finite-Key Analysis
- Authors: Yang Liu, Wei-Jun Zhang, Cong Jiang, Jiu-Peng Chen, Di Ma, Chi Zhang,
Wen-Xin Pan, Hao Dong, Jia-Min Xiong, Cheng-Jun Zhang, Hao Li, Rui-Chun Wang,
Chao-Yang Lu, Jun Wu, Teng-Yun Chen, Lixing You, Xiang-Bin Wang, Qiang Zhang,
and Jian-Wei Pan
- Abstract summary: Quantum key distribution (QKD) holds the potential to establish secure keys over long distances.
We adopt the 3-intensity sending-or-not-sending twin-field QKD protocol with the actively-odd-parity-pairing method.
The secure key rate for the 202 km, the normal distance between major cities, reached 111.74 kbps.
- Score: 18.03339414738153
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum key distribution (QKD) holds the potential to establish secure keys
over long distances. The distance of point-to-point QKD secure key distribution
is primarily impeded by the transmission loss inherent to the channel. In the
quest to realize a large-scale quantum network, increasing the QKD distance
under current technology is of great research interest. Here we adopt the
3-intensity sending-or-not-sending twin-field QKD (TF-QKD) protocol with the
actively-odd-parity-pairing method. The experiment demonstrates the feasibility
of secure QKD over a 1002 km fibre channel considering the finite size effect.
The secure key rate is $3.11\times10^{-12}$ per pulse at this distance.
Furthermore, by optimizing parameters for shorter fiber distances, we conducted
performance tests on key distribution for fiber lengths ranging from 202 km to
505 km. Notably, the secure key rate for the 202 km, the normal distance
between major cities, reached 111.74 kbps.
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