バース大学製: 量子コンピューティング時代に適した光ファイバー(Made at the University of Bath: Optical fibres fit for the age of quantum computing)

2024-07-29 バース大学

バース大学の物理学者たちは、量子コンピュータ時代のデータ転送に対応するための新世代の特殊光ファイバーを開発しました。従来の光ファイバーはシリカガラスの損失による波長制限があり、量子通信には不向きです。バースで開発された特殊光ファイバーは、空気ポケットを含む複雑なマイクロ構造コアを持ち、単一光子や量子ビットに対応可能です。この技術は量子インターネットの実現に不可欠で、長距離通信や量子リピーターのためのソリューションを提供し、量子計算の新たな道を開きます。

<関連情報>

量子応用のための微細構造光ファイバー: 展望
Microstructured optical fibers for quantum applications: Perspective

Cameron McGarry;Kerrianne Harrington;Alex O. C. Davis;Peter J. Mosley;Kristina R. Rusimova
Applied Physics Letters Quantum  Published:July 29 2024
DOI:https://doi.org/10.1063/5.0211055

A quantum network comprising nodes based on different quantum photonic architectures spanning a range of wavelengths and connected with all-fiber links. In a future quantum internet, different hardware architectures will be better suited to certain tasks. These architectures will be linked to distribute quantum operations via optical fiber networks. In addition, the distribution of quantum information between similar nodes is essential for secure communication. Due to the different operating regimes of these architectures, frequency conversion must occur directly within the fiber network. This and other transfer processes must operate with extremely low loss to avoid quantum decoherence.

Recent progress in the development and applications of microstructured optical fibers for quantum technologies is summarized. The optical nonlinearity of solid-core and gas-filled hollow-core fibers provides a valuable medium for the generation of quantum resource states as well as for quantum frequency conversion between the operating wavelengths of existing quantum photonic material architectures. The low loss, low latency, and low dispersion of hollow-core fibers make these fibers particularly attractive for both short- and long-distance links in quantum networks. Hollow-core fibers also promise to replace free-space optical components in a wide range of atomic experiments.

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