August 19, 2012
Quantum Random Number Generator
"Quantum random numbers now live in your browser."
From the September issue of Wired magazine: "Now scientists at the Australian National University [ANU] have introduced a technique for generating 5.7 billion truly random values per second. They do it by harnessing the fundamental uncertainty of the universe. Their technique measures quantum phenomena in a box completely devoid of photons, where ghostly virtual particles randomly burble in and out of existence 24/7."
From the ANU website : "Reliable and unbiased random numbers are needed for a range of applications spanning from numerical modeling to cryptographic communications. While there are algorithms that can generate pseudo random numbers, they can never be perfectly random nor indeterministic."
"Researchers at the ANU are generating true random numbers from a physical quantum source. We do this by splitting a beam of light into two beams and then measuring the power in each beam. Because light is quantized, the light intensity in each beam fluctuates about the mean. Those fluctuations, due ultimately to the quantum vacuum, can be converted into a source of random numbers. Every number is randomly generated in real time and cannot be predicted beforehand."
Below, the abstract of the ANU paper, published in June 2011 in Applied Physics Letters.
Real time demonstration of high bitrate quantum random number generation with coherent laser light
We present a random number generation scheme that uses broadband measurements of the vacuum field contained in the radio-frequency sidebands of a single-mode laser. Even though the measurements may contain technical noise, we show that suitable algorithms can transform the digitized photocurrents into a string of random numbers that can be made arbitrarily correlated with a subset of the quantum fluctuations (high quantum correlation regime) or arbitrarily immune to environmental fluctuations (high environmental immunity). We demonstrate up to 2 Gbps of real time random number generation that were verified using standard randomness tests.
August 19, 2012 at 12:01 PM | Permalink
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I'll have to check this out. Generating truly random numbers has been a very difficult task to accomplish in most of the places that they are needed.
Posted by: 6.02*10^23 | Aug 19, 2012 3:50:05 PM
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