A random selection demonstration device for single-photon secure communication

Abstract

A random selection demonstration device for single-photon security communication proposed by the present invention includes: a substrate, a random selection mechanism, and a single-photon model. A first channel and a second channel are opened on the substrate, and the single-photon model includes a first surface with distinguishing features. and the second surface, the random selection mechanism includes a first steering gear assembly, a second steering gear assembly and a first container, the first container has a first accommodating groove capable of accommodating a single photon model, the first steering gear assembly is arranged on the substrate, The second steering gear assembly drives the first container to rotate so that the positions of the first surface and the second surface of the single photon model in the first storage tank remain unchanged or are exchanged, and the first steering gear assembly drives the second steering gear assembly Rotate, so that the opening of the first accommodating groove is changed from being connected to the second channel to being connected to the first channel, or the opening of the first accommodating groove is changed from being connected to the first channel to being connected to the second channel. The invention can embody the random characteristic of single photon in the communication transmission process, and effectively improve the demonstration and teaching effect.

Description

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

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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