Generation method and device for source independent continuous quantum random number

Abstract

The invention puts forward a generation method and device for a source independent continuous quantum random number. The method comprises the following steps that: a continuous physical random source generates a continuous light field; the continuous light field is subjected to heterodyne detection, and meanwhile, two non-commutative mechanical quantities of the light field are measured, wherein the two non-commutative mechanical quantities are a component X (regular coordinate) and a component P (regular momentum); the continuous measurement results of the two mechanical quantities are discretized to independently obtain an initial random sequence under one component and a checking sequence under the other component; according to the checking sequence, the maximum entropy of a continuous random source is calculated; and through an entropy uncertainty principle and a maximum entropy calculation result, the conditional minimum entropy of the initial random sequence is obtained, and a completely random binary system true random sequence is obtained through postprocessing. By use of the method, additional random number does not need to be provided, the method does not depend on a hypothesis for sources, a "trusted" part in the physical random source can be effectively extracted, and the quantum random number is generated.

Description

technical field [0001] The invention relates to the field of quantum random numbers in information science quantum communication, in particular to a method and device for generating source-independent continuous quantum random numbers. Background technique [0002] Random numbers play an important role in cryptography and secure communication, and are also widely used in a series of occasions such as simulation and gaming. In quantum communication, especially in quantum key distribution technology, random numbers also play a vital role. Theoretically, unconditionally secure secure communication can be realized through quantum key distribution technology combined with the "one-time pad" scheme. However, the core of quantum key distribution lies in the randomness of the key, so an ideal, completely random, sufficient Long sequence of random numbers. [0003] It is difficult to mathematically give a strict and exact criterion for the randomness of the random number sequence. ...

AI Technical Summary

Problems solved by technology

[0005] The actual efficiency of the "device-independent" random number generation method depends on the actual efficiency of the loophole-...

Images