A probabilistic remote real coefficient quantum state preparation method based on unknown parameter GHZ channel

An unknown parameter, long-distance quantum technology, applied in the field of quantum communication

Active Publication Date: 2019-01-04
SUZHOU UNIV
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Problems solved by technology

[0015] Based on this, a probabilistic remote real-coefficient quantum state preparation method based on an unknown parameter GHZ channel is provided to solve the problem of remote quantum state preparation based on an unknown parameter channel

Method used

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  • A probabilistic remote real coefficient quantum state preparation method based on unknown parameter GHZ channel
  • A probabilistic remote real coefficient quantum state preparation method based on unknown parameter GHZ channel
  • A probabilistic remote real coefficient quantum state preparation method based on unknown parameter GHZ channel

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Embodiment 1

[0054] Embodiment 1: A probabilistic state preparation method based on an unknown parameter GHZ channel, which uses probability to prepare real-coefficient quantum states as an example. Specific steps:

[0055] Step 1: Communication preparation stage. Alice is the sender of the communication, and Bob is the receiver of the communication. Alice and Bob share the same two GHZ states and the parameters are unknown (a|000>+b|111>), respectively composed of particles 1, 2, 3, 4, 5 and 6, and use it as a quantum channel:

[0056]

[0057] Among them, Alice has particles 1 and 2, while Bob has particles 3, 4, 5 and 6. The quantum state to be prepared is

[0058] Step 2: remote state preparation process. First, rewrite the state of the communication system as:

[0059]

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Abstract

The invention relates to a probabilistic remote real coefficient quantum state preparation method based on unknown parameter GHZ channel. The method includes the following steps of: sharing two same GHZ entangled states as quantum channels in advance by Alice and Bob as two communication parties and the parameters of the channels are unknown, performing single particle measurement operation and Hmeasurement by Alice, disclosing the results, and performing Bell measurement and H measurement operation by Bob to complete the target of remote state preparation by Alice as a the sender to the receiver Bob. The method mainly includes four steps: (1) a communication preparation stage, wherein Alice is the sender and Bob is the receiver of the communication, and Alice and Bob share two pairs of unknown GHZ states with the same parameters. According to the method, bidirectional information transmission can be realized through Bell measurement, single-particle measurement, H-based measurement and result issuing, thereby making it possible to realize probabilistic-state preparation of the GHZ channel with unknown parameters, in a large extent, it can achieve information transmission in the condition of environmental interference, reduce the interference of quantum communication environment noise to quantum communication, and information distortion reduction.

Description

technical field [0001] The invention relates to quantum communication technology, in particular to a method for preparing a probabilistic remote real-coefficient quantum state based on an unknown parameter GHZ channel. Background technique [0002] Quantum informatics is the fusion of quantum mechanics and informatics. In 1935, the famous scientist Einstein and others proposed the EPR paradox [1], which aroused people's strong interest in the phenomenon of quantum entanglement. Quantum technologies such as teleportation and remote state preparation all use quantum entangled states Implemented as a channel. [0003] Quantum teleportation is a new communication technology model [2-5]. In 1993, Bennett et al. first designed a transmission scheme using quantum and classical channels to transmit unknown single-particle quantum states. The Austrian Zeilinger research team[6] demonstrated the whole process of quantum teleportation to the world for the first time, and achieved su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0852H04L9/0858
Inventor 姜敏王旭夏志新黄旭孙兵
Owner SUZHOU UNIV
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