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Bidirectional single-bit state preparation method based on Brown state and network coding

A network coding, five-bit technology, applied in the field of bidirectional single-bit state preparation based on Brown state and network coding

Active Publication Date: 2020-08-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the idea of ​​quantum network coding, the most common application is the combination with teleportation (QT), and the preparation of known states has always been a popular research object in the field of quantum communication. It has been gradually proposed, but few ideas based on quantum network coding have been implemented. Quantum remote state preparation (RSP) has the same goal as teleportation. Their goal is to send a target to a distant place.

Method used

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  • Bidirectional single-bit state preparation method based on Brown state and network coding
  • Bidirectional single-bit state preparation method based on Brown state and network coding
  • Bidirectional single-bit state preparation method based on Brown state and network coding

Examples

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Embodiment 1

[0129] Example 1: Prepare the target state with the target node C as

[0130] The target state prepared by the destination node D is

[0131] The source node A prepares the target state as

[0132] The source node B prepares the target state as For example, the specific steps are as follows:

[0133] Step 1: The source node A and the destination node C pre-share the five-bit Brown state as a channel, and the five-bit Brown state is in the following form:

[0134]

[0135] The source node B and the destination node D pre-share the five-bit Brown state as the channel, and the form of the five-bit Brown state is as follows:

[0136]

[0137] First, add auxiliary particles to the five-bit Brown state channel shared by source node A and destination node C where A 1 and C 1 Particle A 3 and C 3 With the CNOT operation, the channel becomes the following form:

[0138]

[0139] Where node A owns particle A 1 ,A 2 ,A 3 , node C owns particle C 1 ,C 2 ,C ...

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Abstract

The invention discloses a bidirectional single-bit state preparation method based on a Brown state and network coding. According to the bidirectional single-bit state preparation method, state preparation based on the Brown state and network coding are combined for the first time, cross transmission is carried out between a sender and a receiver through a butterfly network and a five-bit Brown state, and an arbitrary single-bit quantum state scheme is prepared bidirectionally. The bidirectional single-bit state preparation method is mainly characterized in that a quantum network coding model is established through state preparation on the basis of a butterfly network coding protocol. A channel shared by a source node and a destination node is obtained by adding auxiliary particles in the five-bit Brown state and performing channel modulation through CNOT operation. The transmission of known information in the whole network model is realized, compared with a quantum stealth transmissionscheme, the resource consumption is lower, the transmission efficiency reaches a higher level, the bidirectional preparation is innovatively realized, and the communication capacity reaches four bitsper round. The bidirectional single-bit state preparation method has a wide application prospect in the technical field of quantum communication networks.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to a bidirectional single-bit state preparation method based on Brown state and network coding. Background technique [0002] In 2000, Ahlswede et al. found a new way to achieve better network communication performance than before in the basic article of Network Coding. The main idea of ​​network coding is that we can encode information at intermediate nodes in the network, thereby improving throughput, security and reducing network complexity. With the development of quantum information, network coding has been gradually applied to quantum networks. Quantum network coding (QNC) has gradually become a major research area due to its ability to improve the security and efficiency of quantum communication. Since 2006, Hayashi et al. explored the possibility of quantum network coding and proposed the first quantum network coding protocol XQQ. By designing the XQQ protocol, they s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/0855H04L9/0858
Inventor 姜敏杨甬陈虹张佳慧刘芹许智航
Owner SUZHOU UNIV
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