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A Quantum Network Coding Method Based on No Loss of Quantum State

A network coding, quantum state technology, applied in digital transmission systems, secure communication devices, electrical components, etc., to achieve the effect of solving communication problems

Active Publication Date: 2021-08-24
南京万般上品信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In 2010, Ma et al. proposed probabilistic quantum network coding on butterfly networks. This scheme achieves perfect quantum state transmission by pre-sharing non-maximal entangled states between senders. However, due to the use of non-maximal Entangled states make transmission success probabilistic

Method used

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  • A Quantum Network Coding Method Based on No Loss of Quantum State
  • A Quantum Network Coding Method Based on No Loss of Quantum State
  • A Quantum Network Coding Method Based on No Loss of Quantum State

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Experimental program
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Effect test

Embodiment approach 1

[0033] Embodiment 1 A quantum 2-to network encoding technology based on quantum-based non-lost

[0034] Step 1: Figure 1 As shown, it is assumed that each transmission can prepare two particles non-maximum entanglement state, and then transmit one of the entangled states to another sender.

[0035] In the butterfly network, there are two pairs of non-maximum entangled states between the two senders. and Sender S 1 The quantum state to be sent is | ψ> a , Send party S 2 The quantum state to be sent is | ψ> b .

[0036] In order to achieve information non-lost quantum network coding scheme, it is necessary to add an auxiliary particle local to each sender, and the initial state of the total system is:

[0037]

[0038] Among them, send party S 1 Particle S 11 S 12 , Auxiliary particle E 1 , And quantum states to be transferred | ψ> a .

[0039] Sender S 2 Particle S 21 S 22 , Auxiliary particle E 2 , And quantum states to be transferred | ψ> b .

[0040] First, we are sending pa...

Embodiment approach 2

[0069] Embodiment 2 A quantum 3-network encoding technology based on quantum-free non-lost

[0070] Step 1: Figure 4 As shown in the 3-to the network, we specify S i To R 1 The connection between the classic channel. R 1 To R 2 Connection is a classic channel; R 2 To T i The connection between the coil is a classic channel; 1 To T 2 Quantum channel; s 1 To T 3 Classic channel; s 2 To T 1 Quantum channel; s 2 To T 3 Quantum channel; s 3 To T 1 Classic channel; s 3 To T 2 Classic channel.

[0071] Regardless of the quantum channel or the classic channel, only the information transmission is permitted once, and the size of the quantum channel capacity is 1Qubit, the classic channel capacity is 1 bit.

[0072] First, send a party S 1 S 2 Between two pairs of non-maximum entangled states Sum Sender S 2 S 3 Sharing a pair of non-largest entanglement

[0073] After each sender adds an auxiliary particle, the overall state of the system is:

[0074]

[0075] Sender S 1 Perform a loca...

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Abstract

The invention relates to a quantum network encoding method based on quantum state not being lost, which belongs to the technical field of network communication. It is characterized in that two pairs of non-maximally entangled states are pre-shared between the senders of the butterfly network, and the perfect transmission of quantum states with a fidelity of 1 can be achieved by performing a series of local operations on the sender. Adding helper particles on the sender side allows quantum states to be known before they are transmitted across the quantum network. The so-called non-lost quantum state means that when the transmission fails, the quantum state to be transmitted by the sender will not collapse into other states, but the quantum state will be reproduced at the sender. That is to say, when the measurement result of the auxiliary particle is |0>, the realization of |ψ> a →|ψ> b ; When the measurement result of the auxiliary particle is |1>, realize |ψ> a →|ψ> a . The present invention is based on quantum multi-unicast quantum network coding, realizes perfect quantum state cross transmission in the butterfly network model, provides a solution to the problem of quantum 2-pair and k-pair network communication, and has certain practical value .

Description

Technical field [0001] The present invention relates to a method of quantum network coding based on the quantum state is not lost, and performing the secondary resource by adding a local area network operating in the transmission side, the transmission can achieve perfect cross quantum states on the butterfly network, thereby increasing transmission efficiency quantum state , belonging to the technical field of network communications. Background technique [0002] Improve the efficiency of information transmission in the network is an important research topic in the field of information science. In 2000, Ahlswede and others with butterfly web-based, pointed out by network coding can achieve maximum flow boundary multicast routing transmission, improve the efficiency of information transmission, thereby laying the importance of network coding in the field of modern communications research network . [0003] The researchers classical network coding ideas applied to quantum field, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0852H04L9/0858
Inventor 陈秀波徐刚潘兴博
Owner 南京万般上品信息技术有限公司
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