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Method for transmitting 3-particle W-state by 5-particle Brown state based on quantum Fourier transform

A technology of Fourier transform and particles, which is applied in the field of quantum teleportation, can solve the problems that the receiver cannot obtain the correct unitary transformation, cannot realize the transmission of 3-particle W state, etc., and achieves easy calculation, convenient implementation, and improved accuracy and the effect of efficiency

Inactive Publication Date: 2019-04-16
NORTHWEST UNIV(CN)
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method based on quantum Fourier transform of the 5-particle Brown state to transmit the 3-particle W state, in order to solve the problem in the prior art when the 5-particle Brown state transmits the 3-particle W state, because the receiver cannot obtain The corresponding correct unitary transformation form, so that it is impossible to realize the transmission of the 3-particle W state, etc.

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  • Method for transmitting 3-particle W-state by 5-particle Brown state based on quantum Fourier transform
  • Method for transmitting 3-particle W-state by 5-particle Brown state based on quantum Fourier transform
  • Method for transmitting 3-particle W-state by 5-particle Brown state based on quantum Fourier transform

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Embodiment Construction

[0034] The 5-particle Brown state is:

[0035]

[0036] in, Respectively represent four Bell ground states, that is, the 5-particle Brown state includes 4 states.

[0037] The 3-particle W state is:

[0038] |W 3 >=α(|100>+β|010>+γ|001>) Formula 1

[0039] Among them, α, β, and γ are the amplitudes of the corresponding particle states, and their squares add up to 1. |100>, |010>, and |001> represent three ground states, respectively, that is, the three-particle W state includes three states.

[0040] Quantum Fourier transform: Quantum Fourier transform can be implemented in a variety of physical systems, including nuclear magnetic resonance systems, quantum QED, photons, ion traps and other systems, and quantum Fourier transform can also be used in quantum communication, Used to implement quantum key distribution among multiple parties.

[0041]This embodiment discloses a method for transmitting 3-particle W states from 5-particle Brown states based on quantum Fouri...

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Abstract

The invention discloses a method for transmitting 3-particle W-state by 5-particle Brown state based on quantum Fourier transform. A unitary transformation acquisition method based on quantum Fouriertransform is utilized to acquire a relation between a measurement result of the 5-particle Brown state and corresponding unitary transformation, and the problem corresponding to the non-linearity in the 5-particle Brown state transmitting the 3-particle W-state is solved, thereby improving the transmission accuracy and the transmission efficiency.

Description

technical field [0001] The invention relates to a quantum teleportation method, in particular to a method for transmitting a 3-particle W state from a 5-particle Brown state based on quantum Fourier transform. Background technique [0002] Quantum teleportation, also known as quantum teleportation and quantum teleportation, is a technology that uses the characteristics of quantum entanglement and the conversion of some physical information to transmit quantum states to any distance. [0003] The prior art proposes a teleportation scheme that utilizes a 5-particle cluster state to realize a 3-particle GHZ state. However, this scheme requires the sender to perform two Bell-based joint measurements, one Hadamard transformation and one single-particle measurement, and the receiver needs to perform a control NOT gate operation and then perform the corresponding unitary transformation. The steps used are relatively complicated; A scheme for teleporting three-particle W entangled ...

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Application Information

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IPC IPC(8): H04B10/70H04L9/08
CPCH04B10/70H04L9/0852
Inventor 曹正文王家耀彭进业张明慧贺晨宋丹梁可心
Owner NORTHWEST UNIV(CN)
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