A hybrid entangled state generation system and method coupled with spin-orbit angular momentum

A technology of orbital angular momentum and entangled state, applied in the field of mixed entangled state generation system, can solve problems such as signal distortion, achieve high photon utilization rate and reduce mode dispersion effect

Active Publication Date: 2022-04-19
GUANGDONG INCUBATOR TECH DEV CO LTD
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Problems solved by technology

[0005] Chinese patent CN201410361012 proposes a spin-orbit angular momentum hybrid modulation quantum key distribution method and system, which realizes large-capacity quantum key distribution using the spin-orbit angular momentum hybrid entanglement state, but the orbital angle Momentum quantum states are prone to signal distortion during transmission

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  • A hybrid entangled state generation system and method coupled with spin-orbit angular momentum
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  • A hybrid entangled state generation system and method coupled with spin-orbit angular momentum

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Embodiment Construction

[0038] In order to make the object of the present invention, the technical solution and advantages more clearly understood, the following in conjunction with the accompanying drawings of the present invention will be further elaborated, but the scope of the claims of the present invention is not limited to the following specific embodiments.

[0039] Refer to appendix Figure 1 、 2 As shown, a spin - orbital angular momentum coupling hybrid entanglement state generation system, the system comprising a pump light source 10, spin - orbital angular momentum coupling mixed entanglement state conversion unit 11, signal photon sorting unit 12 and signal photon mode dispersion compensation unit 13.

[0040] The pump light source 10 is mainly used to generate a continuous Gaussian beam required by the system, as an input signal to the system. The spin - orbital angular momentum coupling of the hybrid entanglement transformation unit 11 is connected to the pump light source 10, for convert...

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Abstract

The invention discloses a spin-orbit angular momentum coupled hybrid entangled state generation system and method. The system includes a pump light source, a spin-orbit angular momentum coupled hybrid entangled state conversion unit, a signal photon sorting unit and a signal photon sorting unit. Photon Mode Dispersion Compensation Unit. The spin-orbit angular momentum coupling hybrid entanglement conversion unit obtains the spin-orbit angular momentum coupling entanglement state photons; the sorting unit realizes the odd / even l value signal photons through the beam splitter, Duff prism and total reflection mirror Sorting; the signal photon mode dispersion compensation unit compensates the optical path difference for the sorted signal photons through a polarization beam splitter, an electro-optic modulator and a total reflection mirror. The invention realizes the preparation of mixed entangled photons of spin-orbit angular momentum coupling without mode dispersion in transmission, reduces the cost of the transmission system, and improves the practical efficiency of mixed entangled photons of spin-orbit angular momentum coupling. efficiency in application.

Description

Technical field [0001] The present invention belongs to the field of optical fiber communication and quantum secure communication, specifically relates to a spin - orbital angular momentum coupling hybrid entanglement state generation system and method. Background [0002] Photons have a variety of degrees of freedom, such as polarization, spin angle momentum, and orbital angular momentum. Spin angle momentum is related to the circular polarization state of the photon, and the left-handed circular polarization state | L> (eigenvalue +h) and the dexocyrcomarcomarcular polarization state | R> (eigenvalue -h) is the eigenstat of the spin angle momentum operator, and the spin angle momentum can be used to form a common two-dimensional Hilbert space. Orbital angular momentum was only officially discovered at the end of the twentieth century and studies proved that single photons contain definite orbital angular momentum l is the characteristic quantum number of the orbital ang...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/70H04B10/2513
CPCH04B10/70H04B10/25133
Inventor 郭邦红牛泉皓胡敏
Owner GUANGDONG INCUBATOR TECH DEV CO LTD
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