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シリコンでコヒーレントなスピンフォトンインターフェース
1Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Nature
|February 15, 2018
まとめ
研究者は,シリコン電子のスピンとマイクロ波の光子との強い結合を達成し,長距離量子接続を可能にしました. この画期的な発見により 量子コンピューティングは スケール可能で フォトンの通りの全量子ビットの接続が可能になります
科学分野:
- 量子コンピューティング
- 量子情報科学
- 固体物理学
背景:
- シリコン量子ドットは 量子コンピューティングに 長いコヒーレンス時間とスケーラビリティを提供します
- 近隣結合のような 現在の方法は量子ビットの接続性を制限します
- フォトンによる長距離スピン-スピンカップリングを実現することは 量子プロセッサにとって極めて重要です
研究 の 目的:
- シリコンとマイクロ波周波数フォトンの 強い,一貫した結合を証明する.
- スピン・フォトンの相互作用における小さな磁気二極モメントの限界を克服する.
- スピンベースの量子プロセッサーの 相互接続を可能にします
主な方法:
- 磁場グラデーションでスピン・チャージ・ハイブリデーションを利用して,スピン・フォトンの相互作用を高める.
- マイクロ波周波数フォトンを使って スピン・スピン・カップリングを媒介する.
- 単一回転のための一貫した制御と分散的な読み取り技術を実装する.
主要な成果:
- 10メガヘルツを超える強力なスピン・フォトンのカップリング速度を達成し,以前の方法よりも大幅に高い.
- シリコンの個々の電子スピンの一貫した制御と分散的な読み取りを証明した.
- 遠くのスピン間の相互作用を媒介する 有効なメカニズムを確立した.
結論:
- 証明された強力なスピンフォトン結合は,フォトンを用いて単一のスピンを絡めるための直接的な経路を提供します.
- この研究により 拡張可能な量子プロセッサの 基礎を築くことができます
- シリコン量子ドット技術の進歩は加速し 量子コンピューティングの実用化も進んでいます
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