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電子回転のための共振駆動CNOTゲート
D M Zajac1, A J Sigillito1, M Russ2
1Department of Physics, Princeton University, Princeton, NJ 08544, USA.
Science (New York, N.Y.)
|December 9, 2017
まとめ
研究者は,シリコン量子ドットにおける電子スピンのための高速で高精度なCNOTゲートを開発しました. この画期的な発見は 複雑なアルゴリズムに不可欠な 堅固な2量子ビット操作を可能にすることで 普遍的な量子コンピューティングを進歩させています
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:
- ユニバーサル量子コンピューティングは 高精度単量子ビットと2量子ビットゲートに依存しています
- シリコンの電子スピンは キュービットにとって有望なプラットフォームですが 堅牢なCNOTゲートはノイズによって妨げられています
- 以前の取り組みは,核スピン脱フェージングと充電ノイズの課題に直面し,CNOTゲート性能を制限しました.
研究 の 目的:
- シリコンの電子スピンのための高効率で高精度なCNOTゲートを実証する.
- 量子ドットアーキテクチャの核スピン脱相とチャージノイズの限界を克服する.
- シリコンベースの量子プロセッサでマルチキビットアルゴリズムの実装を可能にします.
主な方法:
- シリコン量子ドット装置内の電子スピンに関する共振的に駆動されたCNOTゲート操作を使用した.
- ランダム化ベンチマークで確認された99%以上の精度で単一の量子ビット回転を達成しました.
- 約200ナノ秒で共鳴駆動で量子 CNOT ゲートを実装する制御交換カップリング
主要な成果:
- 高精度でシリコンの電子回転のための共振的に駆動されたCNOTゲートを実証した.
- シングル・クビット回転の精度が99%以上
- 実施された CNOT ゲートを使用して 78% の精度でベル状態を生成し,状態の準備と測定エラーを修正した.
結論:
- 開発されたCNOTゲートは,シリコンベースの量子コンピューティングのための効率的で堅牢な構成要素です.
- 量子ドットデバイスのアーキテクチャは,マルチキビットアルゴリズムの実装を容易にする.
- この研究は,シリコンでスケーラブルで故障を許容する量子コンピューティングへの重要な一歩を表しています.
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