Method and device for deterministic secure quantum communication based on EPR pairs and single photons

A quantum communication and deterministic technology, applied in the field of quantum communication, can solve the problems of low coding capacity, low efficiency, high operation complexity, etc.

Inactive Publication Date: 2013-12-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing DSQC schemes usually have low encoding capacity, low efficiency, and high operational complexity

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  • Method and device for deterministic secure quantum communication based on EPR pairs and single photons
  • Method and device for deterministic secure quantum communication based on EPR pairs and single photons
  • Method and device for deterministic secure quantum communication based on EPR pairs and single photons

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] First, a brief introduction to related background technologies: Assume that two legitimate users are: the sender Alice and the receiver Bob, and the message to be communicated between them is M N ={m 1 ,m 2 ,...,m i ,...,m 2n}, where m i ∈{0,1} and N=2n, 1≤i≤N. In this scheme, the encoding of the message is realized by performing...

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Abstract

The invention provides a method and device for deterministic secure quantum communication based on EPR pairs and single photons. A simple local area unitary operation is carried out on the first particle of each prepared EPR pair, and transmitted secret messages can be encoded; a message receiving end completes interaction between two legal users through auxiliary classic information, and the transmitted secret messages can be decoded by executing Bell basis measurement. The method is high in encoding capacity, high in transmission efficiency, simple in operation and easy to achieve.

Description

technical field [0001] The invention relates to quantum communication technology, in particular to a deterministic secure quantum communication method and device based on EPR pairs and single photons. Background technique [0002] Quantum Communication (QC), as a theoretically unconditionally secure communication mode, has attracted extensive attention recently. Quantum communication is the product of the combination of informatics and quantum mechanics. It uses the quantum state as the information carrier and uses some principles and characteristics of quantum mechanics to transmit and protect information. The security of the quantum communication system mainly depends on the "Heisenberg Uncertainty Relation" (or the Uncertainty Principle) and the "Single Quantum Unreproducible Theorem" (also known as the Unknown Quantum State Uncloning Theorem) in quantum mechanics. ) and quantum properties such as coherence and nonlocality of entangled particles, rather than the computat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L9/08
Inventor 刘建伟王朝尚涛吕盟苏兆安
Owner BEIHANG UNIV
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