Quantum network coding method based on quantum discord

A network coding and quantum technology, applied in the field of communication network, to achieve the effect of reducing quantum resource consumption, improving robustness and throughput

Active Publication Date: 2019-02-22
BEIHANG UNIV
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Problems solved by technology

Although many protocols using quantum correlation as a communication resource have been proposed, it is still far away from realizi

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  • Quantum network coding method based on quantum discord
  • Quantum network coding method based on quantum discord
  • Quantum network coding method based on quantum discord

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Embodiment Construction

[0044] A quantum network coding method based on quantum detuning proposed by the present invention needs to solve the following two problems: (1) The entanglement distribution based on the separated state still mainly stays at the abstract protocol level. There are few studies on the specific operation of the protocol, and how to realize the entanglement distribution scheme of the specific operation is the primary problem that must be solved; (2) The current entanglement distribution realized by using the separated state quantum is limited to the realization of point-to-point entanglement. In order to design a corresponding quantum network coding protocol, it is necessary to pass qubits through a complex network structure to realize the simultaneous generation of quantum entanglement between multiple source nodes and multiple destination nodes. In the process of network transmission, appropriate quantum operations need to be performed without destroying the quantum correlation ...

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Abstract

The invention discloses a quantum network coding method based on quantum discord. Characteristics of the quantum discord are brought into full play, entanglement distribution based on the separated state is combined, and the quantum network coding method based on the quantum discard is designed, thus the quantum resource consumption of the entanglement distribution is reduced, and the robustness and the throughput of a communication network are improved. Compared with the prior art, the quantum network coding method based on the quantum discard provided by the invention has the following advantages: (1), the quantum discard is adopted as a measure of quantum correlation to perform the entanglement distribution from the perspective of taking the quantum correlation as a communication resource, thereby reducing the quantum resource consumption of the entanglement distribution and improving the robustness and the throughput of the communication network; and (2), the quantum network codingmethod is designed by adopting the entanglement distribution based on the separated state, no quantum entanglement is involved in an entanglement establishment process, and an entangled particle pairis generated between a source node and a destination node only at the end, so that the advantages of the quantum invisible transmission state in the aspect of information transmission are fully exerted.

Description

technical field [0001] The invention relates to a quantum network coding method based on quantum detuning, belonging to the technical field of communication networks. Background technique [0002] Quantum network coding is a key technology to improve the transmission efficiency of quantum communication networks. Although the basic idea of ​​quantum network coding is roughly the same as that of classical network coding, the special physical properties of quantum make quantum network coding have many new features. For example, the quantum non-cloning theorem in quantum information theory makes it impossible to realize broadcast and multicast losslessly in quantum communication networks. On communication network nodes, the replication of unknown quantum states must be achieved by sacrificing fidelity. Since the Schrödinger equation is a typical time-reversible equation, any quantum operation in quantum mechanics is reversible. For some irreversible logical operations, such a...

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Application Information

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IPC IPC(8): H04B10/70H04L1/00
CPCH04B10/70H04L1/0076
Inventor 尚涛刘然陈然一鎏孙海正刘建伟
Owner BEIHANG UNIV
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