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System and method for processing mixed entanglement of continuously variable polarization and orbital angular momentum

A technology of orbital angular momentum and processing system, which is applied in the field of processing system of continuous variable polarization and orbital angular momentum mixed entanglement.

Active Publication Date: 2021-10-01
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the work of G. Leuchs et al. prepared the quantum correlation between different degrees of freedom, this correlation is limited to the characteristic of amplitude correlation and is not real quantum entanglement.

Method used

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  • System and method for processing mixed entanglement of continuously variable polarization and orbital angular momentum
  • System and method for processing mixed entanglement of continuously variable polarization and orbital angular momentum
  • System and method for processing mixed entanglement of continuously variable polarization and orbital angular momentum

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Embodiment 1

[0067] like figure 1 , in this embodiment, the processing system for the mixed entanglement of continuous variable polarization and orbital angular momentum may include:

[0068] HG01 mode entanglement unit 1, used to generate and output EPR entangled beam I11 and EPR entangled beam II12. Among them, EPR entangled beam I11 and EPR entangled beam II12 are horizontally polarized HG01 mode lasers.

[0069] The polarization entanglement unit 2 is used to receive the input EPR entangled beam I11, construct the polarization degree of freedom on the EPR entangled beam I11, and obtain the beam III23 and output it.

[0070] The orbital angular momentum entanglement unit 3 is used to receive the input EPR entangled beam II12, construct the orbital angular momentum degree of freedom on the EPR entangled beam II12, obtain beam IV33 and output.

[0071] The Stokes parameter measurement unit 4 is used to measure and verify the light beam III23 and the light beam IV33 which are mixed and e...

Embodiment 2

[0074] like figure 2 , the Stokes parameter measurement unit 4 may specifically include a polarization measurement subunit 41 and an orbital angular momentum measurement subunit 42 .

[0075] In a preferred embodiment of the present invention, the polarization entanglement unit 2 can specifically be used to: receive the EPR entangled beam I11 input through the input end I of the polarization entanglement unit 2; Polarized HG01 mode laser 21; through the polarization beam splitter 22 under the polarization entanglement unit 2, couple the EPR entangled beam I11 and the vertically polarized HG01 mode laser 21, and lock the EPR entangled beam I11 and the vertically polarized HG01 mode The relative phase of the laser light 21 is θ 1 , the beam III23 is obtained, and the beam III23 is output through the horizontal output end of the polarizing beam splitter 22 .

[0076] Further, the polarization measurement subunit 41 under the Stokes parameter measurement unit 4 performs quantum...

Embodiment 3

[0086] like Figure 5 , in this embodiment, the mode coupler 32 may be composed of a 5-mirror asymmetric Mach-Zehnder interferometer, which may specifically include: high reflection mirror I323, high reflection mirror II 324, high reflection mirror III 325, 50 / 50 beam splitter I321 and 50 / 50 beam splitter II 322. Among them, the 50 / 50 beam splitter I321 and the 50 / 50 beam splitter II322 are arranged diagonally; the high reflection mirror I323 is located directly below the 50 / 50 beam splitter I321 and is on the same horizontal line as the 50 / 50 beam splitter II322; The high reflection mirror II 324 and the high reflection mirror III 325 and the high reflection mirror I 323 are arranged diagonally. That is, the two arms of the Mach-Zehnder interferometer have odd and even numbers of mirrors, respectively.

[0087] In this embodiment, each beam can meet the following requirements:

[0088] a) EPR entangled beam I11 and EPR entangled beam II12 satisfy the following entanglemen...

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Abstract

The invention discloses a processing system and method for hybrid entanglement of continuous variable polarization and orbital angular momentum. The processing system includes: an HG01 mode entanglement unit for generating and outputting EPR entangled beam I and EPR entangled beam II; a polarization entanglement unit, It is used to receive the input EPR entangled beam Ⅰ, construct the polarization degree of freedom on the EPR entangled beam Ⅰ, obtain the beam Ⅲ and output it; the orbital angular momentum entanglement unit is used to receive the input EPR entangled beam Ⅱ, and construct it on the EPR entangled beam Ⅱ The orbital angular momentum degree of freedom is used to obtain and output beam IV; the Stokes parameter measurement unit is used to measure and verify the beam III and beam IV that are mixed and entangled with continuous variable polarization and orbital angular momentum. The invention realizes the generation and verification of the mixed entanglement of continuous variable polarization-orbital angular momentum.

Description

technical field [0001] The invention belongs to the field of quantum information and laser technology, and in particular relates to a processing system and method for mixing and entanglement of continuous variable polarization and orbital angular momentum. Background technique [0002] Quantum entanglement is one of the important resources of quantum information science, which has quantum correlation properties that classical light fields do not have. Based on the quantum entanglement effect, the information is encoded, manipulated, transmitted and processed, which effectively guarantees the security of information communication and completes tasks that cannot be accomplished by traditional classical laser communication. Since the photon has multiple degrees of freedom, the manipulation and encoding of the multi-dimensional freedom of the photon can realize the ability of parallel transmission and processing of information, which can greatly increase the information carrying...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28
CPCG02B27/283
Inventor 蔡春晓刁文婷杨文海段崇棣
Owner XIAN INSTITUE OF SPACE RADIO TECH
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