Remote communication method directly safely communicating with quantum by using quantum state injection reinforcement

A technology of long-distance communication and secure communication, applied in the field of quantum secure communication, which can solve the problems of limiting the actual distance and loss of communication

Active Publication Date: 2009-03-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the transmission of photons in the optical fiber inevitably faces the problem of loss, which greatly limits the actual distance of communication

Method used

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  • Remote communication method directly safely communicating with quantum by using quantum state injection reinforcement
  • Remote communication method directly safely communicating with quantum by using quantum state injection reinforcement
  • Remote communication method directly safely communicating with quantum by using quantum state injection reinforcement

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0067] The present invention mainly divides the long distance between the communication parties into N sections of short distances, and each node is provided with a legal user, and each legal user has the same device and resources as the first sender, and the received The detection of the photon and the Belky joint measurement of the entangled photon pair can obtain the corresponding information and copy the information to realize the communication with the next legal user until the quantum communication between the users at the farthest two ends is realized.

[0068] The specific implementation steps are as follows:

[0069] First, we divide the distance between Alice and Bob into N short distances, so there are N-1 nodes in total. as attached figure 2 shown. The quantum communication method based on quantum state injection enhancement sets the same device on each node as the two sides of the communication. The device is as attached image 3 shown.

[0070] (1) During th...

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Abstract

A long-distance communication method for enhancing direct and secure communication with a quantum by injecting a quantum state belongs to the technical field of quantum communication and is characterized in that a long distance between a sender and a receiver is divided into N sections of equal short distances, so that N minus one valid user nodes are formed; the information sender and the N minus one valid user nodes are equipped with the same devices for producing entangled photon pairs; after the N minus one valid user nodes and the receiver are equipped with the same bell's joint measurement device, a relay method is adopted; direct and secure quantum communication in accordance with the preset fault tolerant rate between the sender and a first valid user node is conducted; when the transmission is confirmed to be secure, the first valid user node prepares an entangled photon pair and conducts direct and secure communication with a second valid user node according to the acquired information; and the relay continues until the communication reaches the receiver. The method aims to increase the transmission efficiency, and greatly saves the required resources for transmitting the same information.

Description

technical field [0001] The long-distance communication enhanced by quantum state injection and quantum direct secure communication belongs to the technical field of communication, especially the technical field of quantum secret communication. Background technique [0002] Quantum cryptography is the product of the combination of cryptography and quantum mechanics, and quantum communication is the product of the intersection of quantum mechanics and information science, which has been proven to be absolutely safe. The real application of quantum cryptography to real-life communications will have an immeasurable impact on the country's economy and national defense security. After years of in-depth research by physicists and computer scientists, great progress has been made in quantum secure communication, quantum key distribution, and quantum computing. The role of quantum cryptography communication is to establish and transmit codebooks, that is, to distribute keys between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 王婉莹王川龙桂鲁
Owner TSINGHUA UNIV
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