Multi-hop lossless teleportation method based on non-maximum entangled chain channel

A teleportation and entanglement channel technology, applied in transmission systems, digital transmission systems, secure communication devices, etc., can solve the problem that the two communicating parties do not directly share entangled peers, and achieve the effect of improving efficiency

Active Publication Date: 2019-02-22
ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] Based on this, the present invention provides a multi-hop lossless teleportation method based on a non-maximally entangled chain channel to solve the problem that the communication parties in the communication network do not directly share the entanglement pair

Method used

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  • Multi-hop lossless teleportation method based on non-maximum entangled chain channel
  • Multi-hop lossless teleportation method based on non-maximum entangled chain channel
  • Multi-hop lossless teleportation method based on non-maximum entangled chain channel

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Embodiment 1

[0087] Embodiment 1: A multi-hop lossless teleportation method based on a non-maximally entangled chain channel. Taking two energy levels and two hops as an example, the information sender Alice transmits an unknown single-particle state |χ> to the information receiver Bob src ,Specific steps:

[0088] Step 1: Construct a two-level two-hop quantum lossless teleportation chain channel. The communication parties are Alice and Bob, and the particle src carries an unknown quantum state |χ> src =c 0 |0>+c 1 |1>, held by the information sender Alice, who wants to send the unknown single-particle quantum state to the information receiver Bob through an intermediate node. The entanglement channel between the sender Alice and the intermediate node is: The entanglement channel between the intermediate node and the receiver Bob is:

[0089] Step 2: Direct channel construction. The information sender Alice of the source node, the intermediate node and the information receiver Bob...

Embodiment 2

[0107] Embodiment 2: A multi-hop lossless teleportation method based on a non-maximally entangled chain channel. Taking a three-level single hop as an example, the information sender Alice transmits an unknown single-particle state |χ> to the information receiver Bob src ,Specific steps:

[0108] Step 1: Construct a three-level single-hop lossless quantum teleportation model. The communication parties are Alice and Bob, and the particle src carries an unknown quantum state |χ> src = c 0 |0>+c 1 |1>+c 2 |2>, held by the sender Alice, who wants to send the unknown single-particle quantum state directly to the receiver Bob. The entanglement channel between the sender Alice and the intermediate node is:

[0109] Step 2: Perform a single-hop lossless quantum teleportation process. Introduce an auxiliary particle in the system|0> e , held by the information receiver Bob, the lossless teleportation system becomes as follows:

[0110]

[0111] Step 3: Set a 10 =min{a 10...

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Abstract

The invention relates to a multi-hop lossless teleportation method based on a non-maximum entangled chain channel. Alice and Bob, which do not directly share a quantum entanglement pair at the beginning, continuously carry out entanglement exchange through the help of p middle nodes; finally, a quantum entanglement channel is constructed; and the multi-hop teleportation process of the sender Alicetransmitting a single-particle multi-energy level unknown quantum state to the receiver Bob is completed. The method in the invention uses the non-maximum entangled chain channel; even the sender andthe receiver do not directly share the quantum entanglement pair, the quantum state information can be still transmitted between both the sides; and the requirement for constructing a complex quantumcommunication network can be satisfied; in the multi-hop lossless teleportation system in the invention, if the teleportation process is successfully executed, the information receiver Bob can obtainthe transmitted quantum state information; if the teleportation process fails, the information sender Alice can restore the transmitted unknown quantum state information; and the unknown quantum state information is not lost.

Description

technical field [0001] The invention relates to a quantum communication network and an information dissemination method, in particular to a multi-hop lossless teleportation method based on a non-maximum entanglement chain channel. Background technique [0002] Quantum informatics is an interdisciplinary subject between classical information theory and quantum mechanics, and its research fields mainly include quantum computing and quantum communication. Quantum communication is a new type of communication method that uses quantum entanglement effect to transmit information. The main body of information it transmits is quantum information or classical information, and the channel is quantum channel or quantum channel supplemented by classical channel. In recent years, with the development of quantum communication technology, quantum communication has gradually moved towards the direction of network development. In quantum communication networks, multi-hop teleportation protoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/0858
Inventor 付粉香姜敏黄旭陈虹
Owner ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV
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