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Post-processing Free Quantum Random Number Generator Based on Avalanche Photodiode Array |
| Yang Li1,2, Sheng-Kai Liao1,2**, Fu-Tian Liang1,2, Qi Shen1,2, Hao Liang1,2, Cheng-Zhi Peng1,2 |
1Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315
2Shanghai Branch, Chinese Academy of Sciences Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315
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| Cite this article: |
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Yang Li, Sheng-Kai Liao, Fu-Tian Liang et al 2016 Chin. Phys. Lett. 33 030303 |
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Abstract Quantum random number generators adopting single photon detection have been restricted due to the non-negligible dead time of avalanche photodiodes (APDs). We propose a new approach based on an APD array to improve the generation rate of random numbers significantly. This method compares the detectors' responses to consecutive optical pulses and generates the random sequence. We implement a demonstration experiment to show its simplicity, compactness and scalability. The generated numbers are proved to be unbiased, post-processing free, ready to use, and their randomness is verified by using the national institute of standard technology statistical test suite. The random bit generation efficiency is as high as 32.8% and the potential generation rate adopting the 32$\times $32 APD array is up to tens of Gbits/s.
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Received: 24 October 2015
Published: 31 March 2016
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| PACS: |
03.67.Dd
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(Quantum cryptography and communication security)
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03.67.Hk
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(Quantum communication)
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85.60.Gz
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(Photodetectors (including infrared and CCD detectors))
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