We demonstrate a 6 Gbps real-time optical quantum random number generator by measuring vacuum fluctuation. To address the common problem that speed gap exists between fast randomness generation and slow randomness extraction in most high-speed real-time quantum random number generator systems, we present an optimized extraction algorithm based on parallel implementation of Toeplitz hashing to reduce the influence of classical noise due to the imperfection of devices. Notably, the real-time rate of randomness extraction we have achieved reaches the highest speed of 12 Gbps by occupying less computing resources, and the algorithm has the ability to support hundreds of Gbps randomness extraction. By assuming that the eavesdropper with complete knowledge of the classical noise, our generator has a randomness generation speed of 6.83 Gbps and this supports the generation of 6 Gbps information-theoretically provable quantum random numbers, which are output in real-time through peripheral component interconnect express interface.
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April 2019
Research Article|
April 04 2019
6 Gbps real-time optical quantum random number generator based on vacuum fluctuation
Ziyong Zheng
;
Ziyong Zheng
1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
, Beijing 100876, China
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Yichen Zhang
;
Yichen Zhang
a)
1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
, Beijing 100876, China
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Weinan Huang
;
Weinan Huang
1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
, Beijing 100876, China
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Song Yu
;
Song Yu
b)
1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
, Beijing 100876, China
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Hong Guo
Hong Guo
2
State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science and Center for Quantum Information Technology, Peking University
, Beijing 100871, China
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a)
Electronic mail: zhangyc@bupt.edu.cn.
b)
Electronic mail: yusong@bupt.edu.cn.
Rev. Sci. Instrum. 90, 043105 (2019)
Article history
Received:
October 26 2018
Accepted:
March 08 2019
Citation
Ziyong Zheng, Yichen Zhang, Weinan Huang, Song Yu, Hong Guo; 6 Gbps real-time optical quantum random number generator based on vacuum fluctuation. Rev. Sci. Instrum. 1 April 2019; 90 (4): 043105. https://doi.org/10.1063/1.5078547
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