超伝導量子プロセッサによる2量子ビットアルゴリズムの実証
L DiCarlo1, J M Chow, J M Gambetta
1Department of Physics, Yale University, New Haven, Connecticut 06511, USA.
Nature
|June 30, 2009
まとめ
研究者は2量子ビット超伝導量子プロセッサを開発し,主要な量子アルゴリズムを実証しました. この固体状態の進歩は,スケーラブルな量子コンピューティングと集積回路にとって極めて重要です.
科学分野:
- 量子コンピューティング
- 固体物理学 固体物理学とは
- 超伝導回路は,超伝導回路である.
背景:
- 量子コンピュータは,複雑な問題解決のためのスーパーポジションとエンタグリングを活用します.
- 拡張可能な量子プロセッサの構築は,量子ビットの一貫性,ゲート操作,および読み出しに関する課題に直面しています.
- 以前の数量子ビットのプロセッサは,NMR,イオントラップ,光学システムを使用していたが,固体状態の実現は難しかった.
研究 の 目的:
- 機能する2量子ビット超伝導量子プロセッサを実証するために.
- 固体プラットフォームでグロバー検索とDeutsch-Jozsa量子アルゴリズムを実装する.
- 統合量子回路の開発を進めること.
主な方法:
- 量子量子力学アーキテクチャの回路を利用し,可調の2量子ビット相互作用をキャビティバスで媒介した.
- 制御された量子ビット相互作用の強さは,ナノ秒の時間スケールで2桁の大きさです.
- プログラム可能なゲートの配列を量子ビットの初期化されたレジスタに適用した.
主要な成果:
- 2量子ビット超伝導量子プロセッサの実証に成功しました.
- グロバーの検索とDeutsch-Jozsaの量子アルゴリズムを実装しました.
- 94%の競争力を持つ高度に絡み合った州を生み出しました.
結論:
- この2量子ビットの超伝導プロセッサは,集積回路におけるスケーラブルな量子コンピューティングに向けた重要な一歩を表しています.
- 量子ビットのコヒーレンス時間,ゲートの忠実度,およびレジスタの大きさのさらなる改善は,実用的な量子技術のために必要である.
- 調節可能な相互作用メカニズムは,高いレベルの絡み合いを生成するための鍵です.
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