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Narrow-line-width high-dimensionality quantum entanglement light source generating device

A quantum entanglement and high-dimensional technology, applied in the field of quantum communication, achieves the effects of narrow line width, high stability and strong scalability

Inactive Publication Date: 2015-07-01
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Theoretically, the entanglement generated can be infinite-dimensional, but if the quasi-phase matching of the crystal is optimized according to the Gaussian mode, the high-order components will gradually decrease with the increase of the order, so temporarily limit the dimension of the entangled light source to three-dimensional

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  • Narrow-line-width high-dimensionality quantum entanglement light source generating device

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Embodiment Construction

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0057] figure 1 It is a schematic structural diagram of a narrow-linewidth high-dimensional quantum entanglement light source generation device provided according to an embodiment of the present invention. Such as figure 1 As shown, the narrow-linewidth high-dimensional quantum entanglement light source generation device includes: a pump laser unit 11, a crystal unit 12, a filter unit 13, and a collection and analysis unit 14, wherein:

[0058] T...

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Abstract

The invention discloses a narrow-line-width high-dimensionality quantum entanglement light source generating device. The device comprises a pumping laser unit, a crystal unit, a filter unit and a collection and analysis unit, the pumping laser unit is used for generating pumping light needed in the process of spontaneous parametric down-conversion of the crystal unit, the crystal unit is used for receiving pumping light emitted by the pumping laser unit and utilizing the spontaneous parametric down-conversion process to generate a high-dimensionality quantum entanglement light source carrying orbital angular momentum information, the filter unit is used for filtering pumping light in the high-dimensionality quantum entanglement light source and narrowing line width of the same, and the collection and analysis unit is used for collecting the narrow-line-width high-dimensionality quantum entanglement light source after being processed by the filter unit and measuring entanglement characteristics of the same. The narrow-line-width high-dimensionality quantum entanglement light source generating device has the advantages of convenience in adjusting, high-dimensionality correlation and can be used in various application fields like quantum communication, quantum networks, quantum passwords and quantum physical testing.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to a device for generating a quantum entangled light source with narrow line width and high dimensionality. Background technique [0002] In the field of quantum communication, realizing a quantum network is an important goal. The construction of a quantum network mainly includes the following parts: a quantum light source that can carry information, a channel that can transmit information, and a relay that can store and send information. A terminal for receiving information. Among them, the design of quantum light source is an essential link. The so-called quantum light source includes quantum entanglement light source and single photon source. The entanglement light source can be generated by the parametric down-conversion process of various nonlinear crystals. Its fidelity and The production efficiency can be done very high. [0003] The spontaneous parametric down-conversi...

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Application Information

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IPC IPC(8): H01S3/091H01S3/10
Inventor 刘肖周宗权华怡林李传锋郭光灿
Owner UNIV OF SCI & TECH OF CHINA
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