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Zhang S, Liu J, Zeng G, Zhang C, Zhou X, Wang Q. Machine Learning-Assisted Measurement Device-Independent Quantum Key Distribution on Reference Frame Calibration. ENTROPY (BASEL, SWITZERLAND) 2021; 23:1242. [PMID: 34681966 PMCID: PMC8534342 DOI: 10.3390/e23101242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 11/23/2022]
Abstract
In most of the realistic measurement device-independent quantum key distribution (MDI-QKD) systems, efficient, real-time feedback controls are required to maintain system stability when facing disturbance from either external environment or imperfect internal components. Traditionally, people either use a "scanning-and-transmitting" program or insert an extra device to make a phase reference frame calibration for a stable high-visibility interference, resulting in higher system complexity and lower transmission efficiency. In this work, we build a machine learning-assisted MDI-QKD system, where a machine learning model-the long short-term memory (LSTM) network-is for the first time to apply onto the MDI-QKD system for reference frame calibrations. In this machine learning-assisted MDI-QKD system, one can predict out the phase drift between the two users in advance, and actively perform real-time phase compensations, dramatically increasing the key transmission efficiency. Furthermore, we carry out corresponding experimental demonstration over 100 km and 250 km commercial standard single-mode fibers, verifying the effectiveness of the approach.
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Affiliation(s)
- Sihao Zhang
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
| | - Jingyang Liu
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
| | - Guigen Zeng
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
| | - Chunhui Zhang
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
| | - Xingyu Zhou
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
| | - Qin Wang
- Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (S.Z.); (J.L.); (G.Z.); (C.Z.)
- Broadband Wireless Communication and Sensor Network Technology, Key Lab of Ministry of Education, Nanjing 210003, China
- Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing 210003, China
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Chen YP, Liu JY, Sun MS, Zhou XX, Zhang CH, Li J, Wang Q. Experimental measurement-device-independent quantum key distribution with the double-scanning method. OPTICS LETTERS 2021; 46:3729-3732. [PMID: 34329267 DOI: 10.1364/ol.431061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
The measurement-device-independent quantum key distribution (MDI-QKD) can be immune to all detector side-channel attacks. Moreover, it can be easily implemented combining with the matured decoy-state methods under current technology. It, thus, seems a very promising candidate in practical implementation of quantum communications. However, it suffers from a severe finite-data-size effect in most existing MDI-QKD protocols, resulting in relatively low key rates. Recently, Jiang et al. [Phys. Rev. A103, 012402 (2021).PLRAAN1050-294710.1103/PhysRevA.103.012402] proposed a double-scanning method to drastically increase the key rate of MDI-QKD. Based on Jiang et al.'s theoretical work, here we for the first time, to the best of our knowledge, implement the double-scanning method into MDI-QKD and carry out corresponding experimental demonstration. With a moderate number of pulses of 1010, we can achieve 150 km secure transmission distance, which is impossible with all former methods. Therefore, our present work paves the way toward practical implementation of MDI-QKD.
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Sedziak-Kacprowicz K, Lasota M, Kolenderski P. Remote temporal wavepacket narrowing. Sci Rep 2019; 9:3111. [PMID: 30816284 PMCID: PMC6395858 DOI: 10.1038/s41598-019-39689-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 01/09/2019] [Indexed: 11/09/2022] Open
Abstract
Quantum communication protocols can be significantly enhanced by careful preparation of the wavepackets of the utilized photons. Following the theoretical proposal published recently by our group, we experimentally demonstrate the effect of remote temporal wavepacket narrowing of a heralded single photon produced via spontaneous parametric down-conversion. This is done by utilizing a time-resolved measurement on the heralding photon which is frequency-entangled with the heralded photon. We then investigate optimal photon pair source characteristics to minimize heralded wavepacket width.
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Affiliation(s)
- Karolina Sedziak-Kacprowicz
- Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Toruń, Poland
| | - Mikołaj Lasota
- Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Toruń, Poland
| | - Piotr Kolenderski
- Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Toruń, Poland.
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