High-speed quantum-random number generation by continuous measurement of arrival time of photons

Journal Article · Wed Jul 15 04:00:00 EDT 2015 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4927320· OSTI ID:22482703

Yan, Qiurong ^[1]; Zhao, Baosheng ^[2]; Hua, Zhang; Liao, Qinghong ^[1]; Yang, Hao ^[3]

---

1. Department of Electronic Information Engineering, Nanchang University, Nanchang 330031 (China)
2. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119 (China)
3. Shannxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an 710072 (China)

We demonstrate a novel high speed and multi-bit optical quantum random number generator by continuously measuring arrival time of photons with a common starting point. To obtain the unbiased and post-processing free random bits, the measured photon arrival time is converted into the sum of integral multiple of a fixed period and a phase time. Theoretical and experimental results show that the phase time is an independent and uniform random variable. A random bit extraction method by encoding the phase time is proposed. An experimental setup has been built and the unbiased random bit generation rate could reach 128 Mb/s, with random bit generation efficiency of 8 bits per detected photon. The random numbers passed all tests in the statistical test suite.

• OSTI ID: 22482703
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 7 Vol. 86; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COMPUTER CODES
EFFICIENCY
PHOTONS
RANDOMNESS
VELOCITY