Laser phase fluctuation-based quantum random number generator

Abstract

The invention provides a laser phase fluctuation-based quantum random number generator. The quantum random number generator comprises a laser, an interferometer, a photoelectric detector and an analog-digital converter, wherein the laser is used for generating signal light with phase fluctuation and outputting the signal light to the interferometer; the interferometer is used for converting the phase fluctuation in the signal light into intensity fluctuation and outputting the converted signal light to the photoelectric detector; the photoelectric detector is used for converting light intensity in the received signal light into a current signal and outputting the obtained current signal to the analog-digital converter; and the analog-digital converter is used for converting the received current signal into a discrete digital signal and outputting the discrete digital signal. By applying the quantum random number generator, random numbers can be generated by utilizing the phase fluctuation of the laser, so that the quantum random number generation speed is greatly improved and the cost is reduced.

Description

technical field [0001] The present application relates to the technical field of quantum information communication, in particular to a quantum random number generator based on laser phase fluctuations. Background technique [0002] In modern society, random numbers play an important role in various fields such as economy, science, national defense, and industrial production. Specifically, random numbers have very important applications in statistical analysis, simulation in industry and science, cryptography, and the gaming industry in life. [0003] Classical random number generation methods can only generate pseudo-random numbers. For example, the classic random number generation method in the prior art often generates random numbers based on certain certain algorithms, but this algorithm-based software method can only generate pseudo-random numbers. From the perspective of its generation principle, the pseudo-random number actually just "looks like" a random number, tha...

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Problems solved by technology

[0007] However, in the above-mentioned random number generator based on single photon detection, since a single photodetector is used, the cost is high, and the final random number generation rate is also restricted by the deadtime of the single photodetector, thus There is an upper limit, so that the generation rate of quantum random numbers in the prior art is greatly limited

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