Quantum random number generator and quantum random number generation method

Abstract

The invention provides a quantum random number generator and a quantum random number generation method. The method comprises the following steps of: converting quantum states sent by a random source into two-dimensional quantum states by a compression device and sending the two-dimensional quantum states to a measurement device; randomly using a group of measurement basics in three preset groups of measurement basics to measure the received two-dimensional quantum states by the measurement device according to a preset measurement probability, so as to obtain a measurement result and send the measurement result to an assessment device; taking the measurement result obtained by using random number measurement basics as an initial random number by the assessment device, estimating an average density matrix of each quantum state sent by the random source according to the received measurement result, and calculating randomness of the initial random number according to the average density matrix; and carrying out privacy amplification according to the calculated randomness of the initial random number, so as to obtain a final random number. By applying the quantum random number generation method, the quantum random number generator for the self-detection of the source is realized under a condition that the source is free of assumption, so as to generate required quantum random numbers.

Description

technical field [0001] The invention relates to the technical field of quantum information, in particular to a quantum random number generator and a quantum random number generation method. Background technique [0002] With the development of technology, the transmission of information has become very frequent. In the process of information processing, random numbers play a very important role. For example, in communication security, the randomness of random numbers ensures the security of communication. In addition, in many other fields, such as gaming, numerical simulation, etc., random numbers play an important role. [0003] Random numbers that look random can be generated by methods of classical physics. However, due to the basic principles of classical physics, classical means cannot generate truly random numbers. Because classical random numbers are only pseudo-random, using classical random numbers will bring problems, for example, affecting the security of comm...

AI Technical Summary

Problems solved by technology

[0006] In summary, classical methods cannot generate true random numbers, while traditional quantum random number generators rely on assumptions about the source, so the reliability of their quantum randomness is not strong

If the source of quantum randomness is biased, the randomness of the output cannot be guaranteed to be true or false

For traditional random number generators derived from detection, since the uncertainty relationship is an inequality relationship, the inequality sign is often not available, so the randomness of the source has not been fully extracted

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