Processing system and method for mixed entanglement of continuous variable polarization and orbital angular momentum

A technology for orbital angular momentum and processing systems, which is applied in the field of processing systems for hybrid entanglement of continuous variable polarization and orbital angular momentum, and can solve problems that are not quantum entanglement

Active Publication Date: 2020-01-07
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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  • Processing system and method for mixed entanglement of continuous variable polarization and orbital angular momentum
  • Processing system and method for mixed entanglement of continuous variable polarization and orbital angular momentum
  • Processing system and method for mixed entanglement of continuous variable polarization and orbital angular momentum

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Embodiment 1

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

[0068] HG01 mode entanglement unit 1 is 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 configured to receive the input EPR entangled beam I11, construct polarization degrees of freedom on the EPR entangled beam I11, obtain and output the beam III23.

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

[0071] The Stokes parameter measurement unit 4 is used for measuring and verifying the beam III23 and the beam IV33 which are mixed and enta...

Embodiment 2

[0074] Such as 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 terminal I of the polarization entanglement unit 2; receive the vertical beam I11 input through the input terminal II of the polarization entanglement unit 2; Polarized HG01 mode laser 21; through the polarization beam splitter 22 under the polarization entanglement unit 2, the EPR entangled beam I11 and the vertically polarized HG01 mode laser 21 are coupled, and the EPR entangled beam I11 and the vertically polarized HG01 mode are locked The relative phase of laser 21 is θ 1 , to obtain the beam III23, and output the beam III23 through the horizontal output end of the polarizing beam splitter 22.

[0076] F...

Embodiment 3

[0086] Such as Figure 5 , in this embodiment, the mode coupler 32 can be made up of 5-mirror asymmetrical Mach-Zehnder (Mach-Zehnder) interferometer, specifically can include: high reflective mirror I 323, high reflective mirror II 324, high reflective mirror III 325, 50 / 50 beam splitter I 321 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; High reflection mirror II 324 and high reflection mirror III 325 are arranged diagonally to high reflection mirror I 323 . That is, the two arms of the Mach-Zehnder interferometer have odd and even numbers of mirrors respectively.

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

[0088] a) The EPR entangled beam I11 and the EPR entangled beam II12 satisfy the follow...

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Abstract

The invention discloses a processing system and method for mixed entanglement of continuous variable polarization and an orbital angular momentum. The processing system comprises an HG01 mode entanglement unit used for generating and outputting an EPR entangled beam I and an EPR entangled beam II; a polarization entanglement unit for receiving the input EPR entangled beam I, constructing the polarization degree of freedom on the EPR entangled beam I to obtain a beam III and outputting the beam III; an orbital angular momentum entanglement unit for receiving the input EPR entangled beam II, constructing the orbital angular momentum degree of freedom on the EPR entangled beam II, and obtaining a beam IV and outputting the beam IV; and a Stokes parameter measuring unit for measuring and verifying the beam III and the beam IV of the mixed entanglement of the continuous variable polarization and the orbital angular momentum. The processing system provided by the invention realizes the generation and verification of the mixed entanglement of the 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 Applications(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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