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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: 2013-11-27
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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  • High-fidelity quantum network coding method based on controlled teleportation
  • High-fidelity quantum network coding method based on controlled teleportation
  • High-fidelity quantum network coding method based on controlled teleportation

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Embodiment Construction

[0039] A high-fidelity metric 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 unclonability of quantum and the uncertainty of quantum coding scheme Perfect transmission with a degree of 1? (2) In view of the security problems caused by the reliance on classical information in the quantum information decoding stage, how to ensure the security of information transmission?

[0040] In order to improve the fidelity of transmission, it is necessary to design a better auxiliary cloning protocol or a better coding scheme. By using quantum teleportation to replace the approximate cloning in the classic XQQ protocol, the perfect transmission of the unknown quantum state with a fidelity of 1. According to the idea of ​​controlled teleportation, the decoding control of the receiver is realized by adding the control terminal to the quantum network coding model, whi...

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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 metric sub-network coding method based on controlled teleportation, and 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 limited. The research of quantum network coding is mainly devoted to solving the bottleneck problem of quantum communication network transmission to improve network transmission efficiency. At present, scholars apply the idea of ​​network coding to quantum communication networks and propose some protocols for quantum network coding. Hayashi et al. first began to study the extension of network coding in quantum systems and maximize the transmission rate of quantum states in quant...

Claims

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Application Information

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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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