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Nonlinear photonic crystal and two-photon frequency and path super-entanglement generation method thereof

A technology of photonic crystals and production methods, applied in nonlinear optics, optics, instruments, etc., can solve problems such as two-photon frequency and path super-entanglement sources that have not been designed

Active Publication Date: 2020-07-24
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0007] However, the existing technology has never designed a two-photon frequency and path hyper-entangled source, let alone directly constructed a two-photon frequency and path hyper-entangled source using nonlinear photonic crystals

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  • Nonlinear photonic crystal and two-photon frequency and path super-entanglement generation method thereof
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Embodiment Construction

[0039] The following is a detailed description of the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

[0040] The embodiment of the present invention provides a nonlinear photonic crystal capable of directly producing two-photon frequency and path super-entanglement. The nonlinear photonic crystal is LiNbO doped with MgO at room temperature and under the condition of type I phase matching. 3 crystals.

[0041] As a preferred embodiment, the room temperature refers to the working temperature of the nonlinear photonic crystal design, which is 20-25°C, and more preferably, the room temperat...

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Abstract

The invention provides a nonlinear photonic crystal capable of directly generating two-photon frequency and path super-entanglement. The nonlinear photonic crystal selects a 5% MgO doped LiNbO3 crystal under the conditions of room temperature and class I phase matching (e->-o+o). Meanwhile, the invention provides a two-photon frequency and path super-entanglement generation method based on the nonlinear photonic crystal. According to the method, pump light is normally incident to the surface of the nonlinear photonic crystal in the positive z direction, signal light and idle light are generated after interaction, and the signal light and the idle light meet the frequency and path super-entanglement relation. Simulation is carried out on the nonlinear photonic crystal and the two-photon frequency and path super-entanglement generation method thereof, it is verified that the maximum entanglement state can be generated, other parameter processes are effectively inhibited, and the super-entanglement state with relatively high quality is generated.

Description

technical field [0001] The present invention relates to nonlinear photonic crystal design technology in the technical field of quantum entanglement generation, in particular, to a nonlinear photonic crystal and its two-photon frequency and path super-entanglement generation method, which is a method for directly generating two-photon frequency and path super-entanglement Nonlinear photonic crystal design scheme. Background technique [0002] Quantum entanglement is an important feature of the quantum world, which describes a correlation between particles or particle groups that is not limited by distance. Quantum entanglement is an essential quantum resource for many applications in quantum information processing. It is widely used in quantum key distribution, quantum teleportation, quantum entanglement exchange and relay, and quantum precision metrology. [0003] Hyper-entanglement is a kind of high-dimensional quantum entanglement, which refers to the simultaneous quantum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35G02F1/355
CPCG02F1/3544G02F1/3551G02F1/3558G02F1/3548
Inventor 息朝祥丁译洲何广强
Owner SHANGHAI JIAO TONG UNIV
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