Preparation method of probabilistic long-range complex coefficient quantum state based on unknown parameter ghz channel

Abstract

The invention relates to a probabilistic remote complex coefficient quantum state preparation method based on a parameter-unknown GHZ channel. The method comprises the following steps that: two parties Alice 1 and Alice 2 for communication and Bob pre-share two identical GHZ entangled states serving as quantum channels, and parameters of the channels are unknown; and Alice 1 and Alice 2 perform single-particle measurement operation and publish results, and Bob performs Bell measurement and H measurement operations to complete the aim of the senders Alice 1 and Alice 2 for preparing a combinedremote state for the receiver Bob. The method mainly comprises four steps: (1) a communication preparation stage. Alice 1 and Alice 2 are the senders for the communication, and Bob is the receiver ofthe communication; the senders and the receiver share two pairs of identical parameter-unknown GHZ states. According to the probabilistic remote complex coefficient quantum state preparation method based on the parameter-unknown GHZ channel, bidirectional transmission of information can be realized through the Bell measurement, the single-particle measurement, the H-based measurement and the published results; the probabilistic state of the parameter-unknown GHZ channel can be possibly prepared; information transmission under an environment-interfered condition can be realized to an extremelylarge extent; and the interference of the noise of a quantum communication environment is reduced, and information distortion is reduced.

Description

technical field [0001] The invention relates to quantum communication technology, in particular to a method for preparing a probabilistic remote complex 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...

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Problems solved by technology

[0015] Based on this, a probabilistic remote complex 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

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