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シリコンカルバイドの欠陥スピン量子ビットの室温の一貫した制御
William F Koehl1, Bob B Buckley, F Joseph Heremans
1Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA.
Nature
|November 5, 2011
まとめ
研究者らは,量子技術のためのシリコンカーバイド (SiC) の制御可能な量子スピン欠陥を証明した. これらの欠陥は,ダイヤモンドに似ている.
科学分野:
- 量子コンピューティングとスピントロニクス
- 固体物理学 固体物理学とは
- マテリアルサイエンス 材料科学
背景:
- 半導体内の電子スピンは,量子制御の鍵です.
- ダイヤモンドの窒素空白センターは,固体量子ビットとして確立されています.
- 機能強化のための代替半導体欠陥の探索は極めて重要です.
研究 の 目的:
- シリコンカーバイド (SiC) の制御可能な量子スピン欠陥を調査し,実証する.
- ダイヤモンドの窒素空白センターを超えた新しい量子ビット候補を特定するために.
- 量子情報技術におけるSiCの欠陥の可能性を評価する.
主な方法:
- スピン状態の対処と制御のための光学およびマイクロ波技術.
- タイム・ドメインの一貫した制御実験.
- 20から300Kまでの4H-SiCにおける欠陥スピン特性の特徴.
主要な成果:
- 4H-SiCで複数の欠陥スピン状態の光学的な対応性と一貫した制御が実証されています.
- 4つの非等価な中性炭素-シリコンの二乗スピン状態と2つの未確認のスピン状態を特定しました.
- 観測されたスピンコヒーレンス特性は,ダイヤモンドの窒素空白センターに匹敵する.
結論:
- 4H-SiCの欠陥スピン状態は,量子情報アプリケーションの有望な候補である.
- これらの欠陥は,通信波長の近くで光学的に活発である.
- SiCの工業規模での製造により,これらの欠陥は統合量子技術に非常に適しています.
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