Single-photon safety communication random selection demonstration device

Abstract

The invention provides a single-photon safety communication random selection demonstration device. The device comprises a substrate, a random selection mechanism and a single photon model, a first channel and a second channel are formed in the substrate, wherein the single photon model comprises a first surface and a second surface which have distinguishing characteristics; the random selection mechanism comprises a first steering engine assembly, a second steering engine assembly and a first container. The first container is provided with a first accommodating groove capable of accommodatingthe single photon model; the first steering engine assembly is arranged on the base plate. The second steering engine assembly drives the first container to rotate, so that the positions of the firstsurface and the second surface of the single-photon model in the first accommodating groove are unchanged or exchanged; and the first steering engine assembly drives the second steering engine assembly to rotate, so that the opening of the first accommodating groove is changed from the butt joint second channel to the butt joint first channel, or the opening of the first accommodating groove is changed from the butt joint first channel to the butt joint second channel. According to the invention, random characteristics of single photons in a communication transmission process can be reflected,and demonstration and teaching effects are effectively improved.

Description

technical field [0001] The invention relates to the field of quantum communication teaching and popular science demonstration, in particular to a random selection demonstration device for single-photon secure communication. Background technique [0002] Optical quantum communication is mainly based on the theory of quantum entanglement, and uses quantum teleportation (transmission) to realize information transmission. According to the experimental verification, no matter how far apart two particles with entangled state are, as long as one changes, the other will also change instantaneously. The process of using this characteristic to realize optical quantum communication is as follows: construct a pair of particles with entangled state in advance, and Two particles are placed on both sides of the communication, and the particle with an unknown quantum state is jointly measured with the particle of the sender (an operation), and the particle of the receiver collapses (changes...

AI Technical Summary

Problems solved by technology

[0003] Single-photon secure communication is very safe, reflected in the fact that the key of quantum encryption is random, even if intercepted by a thief, the correct key cannot be obtained, so the information cannot be cracked

However, at present, it is impossible to deeply understand the randomness principle of quantum secure communication only by relying on textbooks, and a set of demonstration and teaching demonstration devices are needed

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