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A High-Fidelity Quantum Network Coding Method Based on Controlled Teleportation

A network coding and teleportation technology, which is applied in the field of communication networks to improve fidelity and security.

Active Publication Date: 2016-03-30
BEIHANG UNIV
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Problems solved by technology

However, the final stage of the scheme relies on classical information for decoding, and there are still security issues

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  • A High-Fidelity Quantum Network Coding Method Based on Controlled Teleportation
  • A High-Fidelity Quantum Network Coding Method Based on Controlled Teleportation
  • A High-Fidelity Quantum Network Coding Method Based on Controlled Teleportation

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[0039] A high-fidelity quantum network coding method based on controlled teleportation proposed by the present invention needs to solve the following two problems: (1) How to achieve fidelity in view of the non-clonability of quantum and the uncertainty of quantum coding schemes? Perfect transmission with degree 1? (2) In view of the security problems caused by the reliance on classical information in the decoding phase of quantum information, how to ensure the security of information transmission?

[0040] In order to improve the fidelity of transmission, a better assisted cloning protocol or a better encoding scheme needs to be devised. By using quantum teleportation instead of approximate cloning in the classical XQQ protocol, perfect transmission of unknown quantum states with a fidelity of 1 can be achieved. According to the idea of ​​controlled teleportation, by adding a control terminal to the quantum network coding model to realize the decoding control of the receiver...

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Abstract

Provided is a high-fidelity quantum network coding method based on controlled teleportation. The method comprises eight steps and is characterized in that based on a pre-shared entanglement pair quantum network coding protocol, two control terminals are added to control decoding of two destination nodes respectively, and perfect transmission with the fidelity of 1 is achieved; a quantum network coding model is established by using the controlled teleportation, one control terminal is added based on source nodes and the destination nodes, the fact that the source nodes and the control terminals share the GHZ state of three particles is ensured, the entanglement state is used as a quantum channel for transmitting a one-particle state, and the fact that the destination nodes will not carry out the decoding on received quantum states till the condition that measuring information of the control terminals is received is met is achieved. The high-fidelity quantum network coding method based on the controlled teleportation takes advantage of the special characteristics of teleportation of quanta, improves safety of the quantum network coding, and has wide application prospect in the technical field of communication networks.

Description

technical field [0001] The invention relates to a high-fidelity quantum network coding method based on controlled teleportation, which belongs to the technical field of communication networks. Background technique [0002] Quantum network coding theory has become a new research direction in the field of quantum computing and quantum information. Compared with classical network coding, the research of network coding in the field of quantum information has just started, and the results obtained are still very limited. The research of quantum network coding is mainly devoted to solving the bottleneck problem of quantum communication network transmission, so as to improve the efficiency of network transmission. At present, scholars have applied the idea of ​​network coding to quantum communication networks, and proposed some protocols on quantum network coding. Hayashi et al. first began to study the extension of network coding in quantum systems to maximize the transmission r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L29/06
Inventor 尚涛赵晓杰王朝黄福华林翔刘建伟
Owner BEIHANG UNIV
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