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Method and device for quantum random number generation

A quantum random number and measurement device technology, applied in random number generators, secure communication devices, digital transmission systems, etc., can solve problems such as limited interest, complex settings, low speed, etc. The effect of reducing the size

Active Publication Date: 2019-08-02
UNIVERSITY OF GENEVA
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Problems solved by technology

However, in practice, this approach involves complex setups including optoelectronic modulators and single-photon detectors fabricated with multiple states
Furthermore, only low rates in the range of a few bits per second can be achieved (e.g. 23bps in the publication by Lungi et al.), suggesting that applications requiring throughput in the Mbps range (such as cryptography, security, gaming and scientific simulations) of limited interest

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  • Method and device for quantum random number generation

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Embodiment Construction

[0027] Hereinafter, the present invention is described in detail with reference to the above-mentioned drawings. figure 1 schematically represents a description of the principle, while figure 2 Handle the concrete implementation of this method. image 3 is a comprehensive overview of the protocol, while Figure 4 The results obtained for the specific implementation of the random number generator are presented. Figure 5 is a detailed description of the method associated with the device.

[0028] figure 1 Schematically illustrates the principle of a quantum random number generator and its conceptual scheme, where a source 110 prepares a physical system in one of two (or possibly more) possible non-orthogonal quantum states ( 130), and send it to the measuring device 120. The measurement device 120 performs an unambiguous state discrimination (USD) measurement and gives an output b. The output b is either deterministic, which indicates the state prepared by the source, or...

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Abstract

The invention is directed to a Quantum Random Number Generator comprising an emitting device (110) triggered by a signal representing an input bit x and adapted to generate and send a physical system(130) characterized by one of two possible quantum states determined by said input bit x, a measurement device (120) adapted to detect said physical system, to identify the quantum state of said physical system through an unambiguous state discrimination measurement and to generate an output b first representing whether the quantum state has been identified or not and, if it has been identified, which quantum state among the two possible quantum states was detected by the unambiguous state discrimination measurement to a processing device (140),the processing device (140) being adapted to estimate the entropy of the output b given the probabilities p(b|x) representing the probability of observing output b for a state preparation x, and a randomness extraction device (150) adapted to extract final random bit stream given the entropy estimate provided by the processing device (140).

Description

technical field [0001] The present invention relates to a device and method for generating quantum random numbers, which provide the probability of precisely quantifying the amount of entropy of the original output stream due to the quantum nature of the process, and generate an entropy per bit close to unity via a randomness extraction process. of the final bitstream. Background technique [0002] Generally, the invention is in the context of generating random numbers. Random numbers are used for many tasks in modern science and technology, including simulations, statistical sampling, gaming applications, and cryptography, both classical and quantum. A good random number generator should generate a chain of bits with high entropy at a high rate. High entropy means that no one can predict the value of a bit until it is revealed, and entropy can also be understood as randomness. This is a basic requirement of most modern data encryption methods. Virtually all commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F7/58H04L9/08
CPCG06F7/588H04L9/0852H04L9/0861H04L9/0858H04L9/0866H04L9/08
Inventor 安东尼·克里斯托夫·麦克·马丁尼古拉·布伦纳雨果·斯宾登约纳坦·布拉斯克约瑟夫·鲍尔斯
Owner UNIVERSITY OF GENEVA
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