シリコンの11 キビット原子プロセッサ
Hermann Edlbauer1, Junliang Wang1, A M Saffat-Ee Huq1
1Silicon Quantum Computing Pty Ltd, UNSW Sydney, Sydney, New South Wales, Australia.
Nature
|December 17, 2025
まとめ
この研究は,シリコンのリン原子を用いた 11 キビット量子プロセッサを実証しています. 研究者は複数の核スピンレジスタの間で高精度エンタグリングを達成し,スケーラブルな量子コンピューティングの重要なステップとなりました.
科学分野:
- 量子コンピューティング
- 原子物理学
- 固体システム
背景:
- シリコンのリン原子の核スピンは 量子コンピューティングに長いコヒーレンス時間と 高精度制御を提供します
- 複数のリン原子をハイパーファインの相互作用で結合することで,マルチキビット制御と小規模の量子アルゴリズムが可能になります.
- 量子プロセッサをスケーリングするには,複数のスピンレジスタに非局所的に高精度エンタグリングを拡張する必要があります.
研究 の 目的:
- 高精度,非ローカルな絡み合いを可能にする 11 キビット原子プロセッサを開発し,実証する.
- 量子情報処理のための相互接続された核スピンレジスタの性能を調査する.
- 原子プロセッサを用いた 容認性量子コンピューティングを進める
主な方法:
- 2つの多核スピンレジスタを電子交換相互作用で接続した11キビットプロセッサを設計した.
- 高精度シングルとマルチクビットゲートを達成するための高度な校正と制御プロトコル.
- グリーンベルガー-ホーン-ゼイリンガー (GHZ) 状態生成を含む,局所的および非局所的核スピンペアの絡み合いを実行した.
主要な成果:
- シングルとマルチクビットゲートフェデリティは99.10%から99.99%まで.
- 様々なスピンペアの組み合わせで 99.5%までの最先端のベル状態の忠誠性を実証しました.
- GHZ状態を生成し,最大8つの核スピンの絡み合いを示した.
結論:
- 相互接続された核スピンレジスタの間で高精度操作を確立した.
- 原子プロセッサでスケーラブルで 欠陥を許容する量子コンピューティングの 重要なマイルストーンを実現しました
- 開発されたプロセッサのアーキテクチャと制御方法は,将来の量子技術にとって有望です.
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