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電子が液体ヘリウム上で浮いている量子コンピューティング

Platzman¹, Dykman

¹Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA. Michigan State University, Department of Physics and Astronomy, East Lansing, MI 48824, USA.

Science (New York, N.Y.)

|June 18, 1999

まとめ

研究者は,液体ヘリウムの上に閉じ込められた電子を量子ビットとして使用することを提案しています. これらの強烈に相互作用する量子ビットは,電場によって操作され,量子コンピューティング研究のための新しい道を開くことができます.

科学分野:

量子物理学とは,量子物理学のことです.
凝縮物質物理学凝縮物質物理学
量子情報科学とは,量子情報科学である.

背景:

液体ヘリウムの上に閉じ込められた電子は,強力な相互作用と長い相関時間により,量子コンピューティングのための有望なプラットフォームを提供します.
以前の研究では,量子ビットのさまざまなシステムを調査しましたが,操作とスケーラビリティに課題が残っています.

研究の目的:

液体ヘリウムの上に閉じ込められた準二次元電子を用いた新しい量子ビットシステムを提案する.
これらの電子システムに格納された量子情報を操作し,読み出す方法の概要を述べる.

主な方法:

電子を液体ヘリウム膜の上の1次元の水素レベルに閉じ込め,マイクロメートルの金属パッドを使用します.
電子波関数をミリケルビン温度で操作するために電場を利用する.
刺激された電子を放出することにより,読み出しのために逆転直流電圧を使用します.

主要な成果:

閉じ込められた電子を使用して,強く相互作用する量子ビットのセットを作成する可能性を実証しました.
ナノ秒で電子波関数の操作を達成しました.
観測された波動関数の相関時間は0.1ミリ秒です.

結論:

液体ヘリウムの上に閉じ込められた電子の提案されたシステムは,量子ビットの実行可能で容易に操作可能なプラットフォームです.
このアプローチは,量子情報処理と量子コンピューティング技術の進歩の可能性を秘めています.

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