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SUMMARY:True Random Number Generation based on Interference between Two In
dependent Lasers
DTSTART;VALUE=DATE-TIME:20150616T160000Z
DTEND;VALUE=DATE-TIME:20150616T161500Z
DTSTAMP;VALUE=DATE-TIME:20200601T195610Z
UID:indico-contribution-841582@indico.cern.ch
DESCRIPTION:Speakers: Caleb John (University of Calgary)\nReliable true ra
ndom number generation is essential for information theoretic security in
a quantum cryptographic system based on quantum key distribution (QKD) and
one-time pad encryption [1]. Various random number generation methods hav
e already been proposed and demonstrated\, such as schemes based on the de
tection of single photons [2]\, whose rate is limited by the dead time of
single photon detectors. Alternative approaches are based on the chaotic l
ight emission from a semiconductor laser [3\, 4]. In this talk we propose
and demonstrate a novel scheme to generate random numbers based on interfe
rence between two independent lasers\, i.e. a continuous wave (CW) laser a
nd a gain-switched pulsed laser\, each emitting light at around 1550 nm wa
velength. The physical basis of our random number generator is the randomn
ess of the phase difference between light emitted from the two independent
lasers. Using only off-the-shelf components\, we achieve a random number
generation rate of 250 MHz. The properties of the generated random numbers
are tested using National Institute Standards and Technology (NIST) stati
stical test suite. We also discuss the extension of our methods from rando
m bits to randomly selected symbols with more than two different values.\n
\nReferences\n\n[1] N. Gisin\, and R. Thew\, “Quantum communication\,”
Nature Photon. 1\, 165 (2007).\n\n[2] A. Stefanov\, N. Gisin\, O. Guinnar
d\, L. Guinnard\, and H. Zbinden\, “Optical quantum random number genera
tor\,” J. Mod. Opt. 47\, 595 (2000).\n\n[3] T. Symul\, S. M. Assad\, and
P. K. Lam\, “Real time demonstration of high bitrate quantum random num
ber generation with coherent laser light\,” Appl. Phys. Lett. 98\, 23110
3 (2011).\n\n[4] A. Uchida\, K. Amano\, M. Inoue\, K. Hirano\, S. Naito\,
H. Someya\, I. Oowada\, T. Kuashige\, M. Shiki\, S. Yoshimori\, K. Yoshim
ura\, and P. Davis\, “Fast physical random bit generation with chaotic s
emiconductor lasers\,” Nature Photon. 2\, 728 (2008).\n\nhttps://indico.
cern.ch/event/355942/contributions/841582/
LOCATION:University of Alberta CCIS L2-200
URL:https://indico.cern.ch/event/355942/contributions/841582/
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