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Proceedings Paper

Generation of physical random numbers by using homodyne detection
Author(s): Kodai Hirakawa; Shota Oya; Yusuke Oguri; Tsubasa Ichikawa; Yujiro Eto; Takuya Hirano; Toyohiro Tsurumaru
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Paper Abstract

Physical random numbers generated by quantum measurements are, in principle, impossible to predict. We have demonstrated the generation of physical random numbers by using a high-speed balanced photodetector to measure the quadrature amplitudes of vacuum states. Using this method, random numbers were generated at 500 Mbps, which is more than one order of magnitude faster than previously [Gabriel et al:, Nature Photonics 4, 711-715 (2010)]. The Crush test battery of the TestU01 suite consists of 31 tests in 144 variations, and we used them to statistically analyze these numbers. The generated random numbers passed 14 of the 31 tests. To improve the randomness, we performed a hash operation, in which each random number was multiplied by a random Toeplitz matrix; the resulting numbers passed all of the tests in the TestU01 Crush battery.

Paper Details

Date Published: 24 October 2016
PDF: 6 pages
Proc. SPIE 9996, Quantum Information Science and Technology II, 99960Q (24 October 2016); doi: 10.1117/12.2241362
Show Author Affiliations
Kodai Hirakawa, Gakushuin Univ. (Japan)
Shota Oya, Gakushuin Univ. (Japan)
Yusuke Oguri, Gakushuin Univ. (Japan)
Tsubasa Ichikawa, Gakushuin Univ. (Japan)
Yujiro Eto, Gakushuin Univ. (Japan)
Takuya Hirano, Gakushuin Univ. (Japan)
Toyohiro Tsurumaru, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 9996:
Quantum Information Science and Technology II
Mark T. Gruneisen; Miloslav Dusek; John G. Rarity, Editor(s)

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