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Continuous variable entanglement generation device and method

A variable and entangled state technology, applied in the field of entangled state generating devices, can solve the problem of failing to generate multi-component entangled states, and achieve the effects of easy manipulation, simple device and strong practicability

Active Publication Date: 2012-10-03
SHANXI UNIV
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Problems solved by technology

The above three articles are general fundamental transverse mode entanglement, and none of them involve orbital angular momentum entanglement
In the fourth article, only an experimental device for producing multimode compression was given, but failed to produce multicomponent entangled states

Method used

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  • Continuous variable entanglement generation device and method
  • Continuous variable entanglement generation device and method
  • Continuous variable entanglement generation device and method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing:

[0024] figure 1 is a schematic diagram of a high-order transverse mode astigmatism compensation device. First, a pair of first birefringent crystals 10 and second birefringent crystals 12 of the same length and type are placed in a relative rotation of 90 degrees, where x, y and z are crystal axes. Then, a half-wave plate 11 is inserted between the two crystals 10 and 12, and the angle of the half-wave plate 11 relative to the crystal axis of the first birefringent crystal 10 is 45 degrees. Wherein, C1 and C2 are the crystal axis directions of the wave plate 11 ( figure 1 b). If two beams of HGmn mode beams with different polarizations (e1 and e2) pass through the device, their Gouy phase: for e1 polarized light: For 2 polarized light is e: It can be seen from the above formula that, through the above method, the Gouy phases of all high-order modes with the same m+n ...

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Abstract

The invention provides a continuous variable entanglement generation device and method. The continuous variable entanglement generation device comprises a high-order transverse mode astigmatism compensation device. A plurality of pairs of continuous variable high-order transverse mode entanglement states are simultaneously generated in a single OPO (Optical Parametric Oscillator) through compensating the astigmatism effect of a high-order transverse mode to achieve continuous variable multi-cluster entanglement, and the entanglement state is also a hyper-entanglement state with both track angular momentum and spin angular momentum entanglements. The continuous variable entanglement generation device has a simple structure, is easy to control, has strong practicability and can be used in space measurement, image processing and quantum communication.

Description

technical field [0001] The invention relates to an entanglement state generation device in the field of quantum information, in particular to a continuous variable entanglement generation device, more specifically a device for generating multiple pairs of continuous variable high-order transverse mode entanglement states. Background technique [0002] As an important resource in quantum information science, entangled states are widely used in the fields of quantum state transfer, quantum computing, and quantum key distribution. It ensures that the communication and processing of quantum information is more effective and secure. [0003] Related research work before this includes: [0004] 1. In 2005, Su Xiaolong and others published an article entitled "Experimental Generation of Continuous Variable Four-Component Cluster and GHZ Entangled States" on Phys.Rev.Lett. The linear coupling on the beamer produces a 4-component entangled state. ` [0005] 2. Matthew Pysher et al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
Inventor 郜江瑞刘奎崔淑珍张俊香
Owner SHANXI UNIV
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