Realization of a source-device-independent quantum random number generator secured by nonlocal dispersion cancellation

Ji-Ning Zhang; Ran Yang; Xinhui Li; Chang-Wei Sun; Yi-Chen Liu; Ying Wei; Jia-Chen Duan; Zhenda Xie; Yan-Xiao Gong; Shi-Ning Zhu

doi:10.1117/1.AP.5.3.036003

Advanced Photonics, Volume. 5, Issue 3, 036003(2023)

Realization of a source-device-independent quantum random number generator secured by nonlocal dispersion cancellation

Ji-Ning Zhang^1,2,3, Ran Yang^1,2,3, Xinhui Li^1,2,3、*, Chang-Wei Sun^1,2,3, Yi-Chen Liu^1,3,4, Ying Wei^1,2,3, Jia-Chen Duan^1,2,3, Zhenda Xie^1,3,5, Yan-Xiao Gong^1,2,3,6、*, and Shi-Ning Zhu^1,2,3

Author Affiliations

¹Nanjing University, National Laboratory of Solid State Microstructures, Nanjing, China

²Nanjing University, School of Physics, Nanjing, China

³Nanjing University, Collaborative Innovation Center of Advanced Microstructures, Nanjing, China

⁴Qingdao University of Technology, School of Science, Qingdao, China

⁵Nanjing University, School of Electronic Science and Engineering, Nanjing, China

⁶Hefei National Laboratory, Hefei, China

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Figures & Tables(6)

Fig. 1. Experimental setup of the source-DI QRNG. (a) Entanglement source: the time–energy entangled photon pairs are generated from the Ti:PPLN waveguide pumped by a pulsed laser with a duration of 5 ns, which are separated by a PBS. (b) Measurement device: photons are passively selected for measurement $T_{δ}$ or $D_{δ}$ by a 90:10 beam splitter (BS) after being coupled to fiber in Alice and Bob sides. PC, polarization controller; FI, filter; C-BG, chirped Bragg grating; OC, optical circulator; SNSPD, superconducting nanowire single-photon detector; and TDC, time-to-digital converter.

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Fig. 2. Photon coincidence counts (CCs) recorded for four measurement combinations of two observers (denoted as $A$ and $B$ ) in 10 s.

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Fig. 3. Smooth entropy $H_{low}^{ϵ} (T_{δ}^{A} | E)_{ρ}$ with respect to the frame size $N_{d}$ for different processing units $N_{T}^{A}$ . The dotted lines represent the entropy evaluated from the experimental data. The red triangles represent optimal results.

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Fig. 4. Autocorrelation coefficients of raw random data and final random data.

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Fig. 5. Results of NIST statistical test suite.

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Table 1. Features of our protocol as compared to the features of existing semi-DI QRNG protocols.

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Table 1. Features of our protocol as compared to the features of existing semi-DI QRNG protocols.


Refs.	Uncharacterized Source	Uncharacterized Measurement	Finite-size Analysis	Finite Measurement Ranges Considered^a	Generation Rate
15	×	√	×	—	5.7 kbps
17	×	√	√	×	47.8 Mbps
20	√	×	√	—	1 Mbps
21	√	×	√	×	8.05 Gbps
24	√	×^b	√	—	1 Mbps
25	√^c	√	√	—	23 bps
27	√^d	√	√	—	1.25 Mbps
31	√	×	√	×	17 Gbps
This work	√	×	√	√	4 Mbps

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Ji-Ning Zhang, Ran Yang, Xinhui Li, Chang-Wei Sun, Yi-Chen Liu, Ying Wei, Jia-Chen Duan, Zhenda Xie, Yan-Xiao Gong, Shi-Ning Zhu, "Realization of a source-device-independent quantum random number generator secured by nonlocal dispersion cancellation," Adv. Photon. 5, 036003 (2023)

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Paper Information

Category: Research Articles

Received: Nov. 21, 2022

Accepted: Apr. 13, 2023

Posted: Apr. 14, 2023

Published Online: May. 6, 2023

The Author Email: Li Xinhui (lixinhui@nju.edu.cn), Gong Yan-Xiao (gongyanxiao@nju.edu.cn)

DOI:10.1117/1.AP.5.3.036003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology