電子回路で単一のマイクロ波フォトンを生成する

A A Houck¹, D I Schuster, J M Gambetta

¹Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.

Nature

|September 21, 2007

まとめ

研究者らは,量子通信のためのオンチップ,オンデマンドの単光子源を開発した. この量子光学の突破は,マイクロ波フォトンをワイヤに効率的に注入し,チップ間の量子情報転送を可能にします.

科学分野:

量子光学とは,量子光学である.
固体物理学固体物理学とは
量子情報科学とは,量子情報科学である.

背景:

クラシック通信にはマイクロ波が不可欠ですが,量子通信には単一の光子が必要です.
従来の単光子光源は,量子回路に簡単に統合できません.
量子コンピューティングと通信には,効率的なオンチップ単光子源が必要です.

研究の目的:

量子通信のためのオンチップ,オンデマンドの単光子源を実証する.
集積回路にマイクロ波フォトンの効率的な注入を可能にするために.
フライングクビットを使用してチップの間の量子情報転送を容易にするために.

主な方法:

サーキット量子電動学のアーキテクチャを利用した.
単一の超伝導量子ビットから自発的な放射を高めるために,マイクロ波伝送ラインの空洞を使用しました.
量子ビットに量子トモグラフィーを施し,光子を放出しました.

主要な成果:

高い効率とスペクトルの純度を持つオンチップ,オンデマンドの単光子源を実証しました.
量子ビットから放射される光子への量子相と振幅の移転を確認しました.
フォトン源の平均電力と電圧を特徴づけた.

結論:

開発された単光子源は,チップ上の量子光学の重要な進歩です.
この技術は,集積回路内の量子通信を容易にする.
量子コンピュータとネットワークを構築するためのツールキットが増えるのに寄与しています.

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