ブレイク・イブンを超えたリアルタイム量子エラー修正
V V Sivak1,2,3,4, A Eickbusch5,6,7, B Royer5,6,7,8,9
1Department of Physics, Yale University, New Haven, CT, USA. vladsivak@google.com.
Nature
|March 23, 2023
まとめ
研究者は量子コヘレンスを拡張する 安定した論理量子ビットを実証し 量子コンピューティングにおける 脱コヘレンスの課題を克服しました この突破は量子エラー補正 (QEC) 能力を大幅に改善します
科学分野:
- 量子情報科学
- 量子コンピューティング
- 量子エラー 修正
背景:
- 量子計算は量子コヘランスを維持することに 依存しています これは基本的にデコヘランスによって 挑戦されています
- 量子エラー補正 (QEC) は,協働プロセスを使用して,エラーが蓄積するより早くエラーを排除することを目的としています.
- これまでのQEC実験では過度の誤差が生み出され,実用化が困難でした.
研究 の 目的:
- 量子一貫性を拡張するための実用的な量子エラー修正 (QEC) 方法を実験的に実証する.
- 個々の量子コンポーネントよりも長い量子コヒーレンス時間を可能にするかどうかを判断する.
主な方法:
- 完全に安定した論理量子ビットシステムの開発
- 超伝導量子回路製造の革新を統合する
- プロセス最適化のためのモデルフリー強化学習の適用
主要な成果:
- 構成要素よりもはるかに長い量子コヒーレンスを持つ 論理量子ビットを示した.
- 個々の量子ビットの性能を上回る G = 2.27 ± 0.07 のコヒーレンス・ゲインを達成しました.
- 前回の実験の限界を乗り越えて 論理量子ビットを安定させ 誤りを修正しました
結論:
- 量子コヘランスを拡張するために QEC を利用することは事実上可能である.
- 証明されたQECアプローチは,論理量子ビットの安定性とコヒーレンス時間を大幅に改善します.
- この研究は より堅牢でスケーラブルな量子コンピュータの 基礎をなしています
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