Quantum repeater based general graph network encoding scheme

A network coding and repeater technology, applied in the field of communication network, can solve the problem of EFC optimality not solved

Active Publication Date: 2015-05-06
BEIHANG UNIV
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Problems solved by technology

Although the degree 3(D 3 ) graph decomposition method and EFC clone method, but the optimality of EFC is s

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  • Quantum repeater based general graph network encoding scheme
  • Quantum repeater based general graph network encoding scheme
  • Quantum repeater based general graph network encoding scheme

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Embodiment Construction

[0082] The general graph network coding scheme based on the quantum repeater proposed by the present invention needs to solve the following two problems: (1) how to design a universal network node that supports long-distance quantum communication is the primary problem that must be solved; (2) how to Design a quantum channel generation algorithm for general network structures, thereby realizing quantum network coding for complex topological network structures.

[0083] The main realization idea of ​​the present invention is: in the long-distance communication system of the quantum repeater, a long-distance quantum channel is firstly established for both communication parties with the help of quantum relay technology, and then the quantum characteristics of the quantum channel are used to realize safe communication. Quantum information transmission. The key technology of the quantum relay network is to use only LOCC and EPR pairs between adjacent nodes, so that EPR pairs are gene...

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Abstract

The invention relates to a quantum repeater based general graph network encoding scheme. The scheme comprises the three steps of first, extracting a complex-topological-structure network into a general graph, and simplifying the network mode through a general graph to D3 graph transformation method; second, encoding the transformed D3 network, and generating quantum entanglement channels between information source nodes and information sink nodes, wherein the information source nodes and the information sink nodes must have shared (Einstein-Podolsky-Rosen) pairs so as to establish a quantum teleportation network, and the D3 graph is operated through the shared EPR pairs between any two adjacent nodes and a Local Operation and Classical Communication (LOCC) algorithm, so that the EPR pair is generated between the information source node and the information sink node to form the quantum channel; third, quantum information is transmitted through the quantum entanglement channel, and transmission of unknown quantum states from the information source nodes to the information sink nodes is achieved through a quantum teleportation mode. By means of the scheme, the quantum network encoding scheme towards the complex-topological-structure network is designed by combining a quantum repeater and the general graphs, and accordingly, high-reliability and high-rate multi-source model remote communication is achieved.

Description

technical field [0001] The invention relates to a general graph network coding scheme based on a quantum repeater, and belongs to the technical field of communication networks. Background technique [0002] Quantum network coding can improve the security and efficiency of quantum communication, and has gradually become a research hotspot in the field of quantum communication in recent years, and has achieved significant results in theoretical research. In 2006, Hayashi et al. analyzed the transmission problem of qubits in the butterfly topology and proposed the XQQ (Crossing Two Qubits) protocol, which realized the cross-probabilistic transmission of two arbitrary quantum states and made quantum network coding possible. In 2007, Hayashi applied quantum teleportation (Quantum Teleportation) to quantum network coding from a new perspective, and designed a quantum network coding scheme based on the sender's pre-shared entanglement state (Prior Entanglement), realizing the perfe...

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Application Information

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IPC IPC(8): H04L1/00
Inventor 尚涛李娇裴壮彭天丽杜岗刘建伟
Owner BEIHANG UNIV
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