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Remote Joint Preparation of Arbitrary Two-Photon States Based on Linear Optical Elements

A technology of joint preparation of optical components, applied in the field of communication, can solve problems such as complex remote preparation, and achieve the effect of strong feasibility and high communication efficiency

Inactive Publication Date: 2017-11-17
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the number of photons increases, the multi-photon state coefficient increases exponentially. The remote preparation of any multi-photon state is much more complicated than the remote preparation of any single-photon state, and the existing arbitrary single-photon state scheme is difficult to be extended to the multi-photon state.

Method used

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Embodiment Construction

[0015] The method for remote joint preparation of arbitrary two-photon states based on linear optical elements of the present invention will be further described below in combination with embodiments.

[0016] There are three participants in the remote joint preparation method of arbitrary two-photon states based on linear optical elements in the present invention, including a first sender, a second sender and a receiver.

[0017] The first sender, the second sender, and the receiver share M five-photon entangled states, where the first sender is the producer of the five-photon entangled state, and the first sender owns the first photon of each five-photon entangled state and the third photon, the second sender has the fourth photon of each five-photon entanglement state, and the receiver has the second photon and the fifth photon of each five-photon entanglement state; suppose the quantum state to be prepared is |ψ>= alpha 00 |00>+α 01 |01>+α 10 |10>+α 11 |11>, where α 0...

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Abstract

The invention provides a remote combined preparation method for any two-photon state based on a linear optical element. In the method, three participants are involved, and the participants include a first sending party, a second sending party and a receiving party; the first sending party, the second sending party and the receiving party share M five-photon entangled states, wherein the first sending party is used as a preparation side of the five-photon entangled states, the first sending party owns a first photon and a third photon of each five-photon entangled state, the second sending party owns a fourth photon of each five-photon entangled state, and the receiving party owns a second photon and a fifth photon of each five-photon entangled state. According to the method provided by the invention, two sending parties and one receiving party share one five-photon entangled state, consequently, remote combined preparation of any two-photon state can be realized, the communication efficiency is high, and the feasibility is high; moreover, implementation of the scheme may require no use of a maximally entangled channel, thus, the cost of implementation of the scheme is saved greatly, and the technical requirements on implementation of the scheme are lowered.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for remote joint preparation of arbitrary two-photon states based on linear optical elements. Background technique [0002] As we all know, current communication channels transmit digital or analog signals. Due to the non-ideal frequency response characteristics of the channel, noise interference and other interference mixed in when the signal is transmitted through the channel, the transmitted signal is damaged and the received signal waveform is distorted or the received digital signal symbol is wrong. For this kind of interference, there are currently two ways to ensure the correct transmission of the channel: one is to improve the performance and quality of lines and transmission equipment, such as using optical fibers; the other is to use error control strategies, such as cyclic redundancy check method Wait. However, improving lines and equipment requires t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70
CPCH04B10/70
Inventor 周萍
Owner GUANGXI UNIV FOR NATITIES