ローカル・スピン交換で2つの輸送可能な中性原子を絡める
A M Kaufman1,2, B J Lester1,2, M Foss-Feig3
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309, USA.
Nature
|November 3, 2015
まとめ
研究者たちは,移動可能な光学ピンチを使って,超冷たい中性原子を絡める新しい方法を示しています. この技術は量子情報科学の応用のために量子エンタグメントを保存し,量子ビットの局所的なエンタグメントと分離を可能にします.
科学分野:
- 量子情報科学
- 原子物理学
- 量子コンピューティング
背景:
- 量子情報科学において 堅固な2量子ビットの絡み合いを実現するには 特定の物理システムが必要です
- 長期間の相互作用 (Coulomb,Rydberg) を利用する現在の方法は,環境結合とクロストークで課題に直面しています.
- 局所的な相互作用は有害な影響を減らしつつ 量子ビットの輸送と融合を必要とします
研究 の 目的:
- 2つの超冷たい中性原子を準備し,局所的に絡めるための新しい方法を実証する.
- 原子を分離した後に 絡み合いが維持できるということを示すために
- 空間的に分離された原子の絡み合いを確認するための新しいプロトコルを開発する.
主な方法:
- 移動可能な光学ピンチを使って 超冷たい中性原子を操作する
- ローカルなエンタグリング操作でスピン交換の相互作用を使用します.
- 量子トンネリングを使って 原子を組み合わせて分離し 制御された相互作用と貯蔵を行います
主要な成果:
- 2つの超冷たい中性原子を 局所的に巻き込みました
- 原子を分離した後の 絡み合いの保存を証明した
- 局所的なグラデントとパリティの測定を用いて位置を決定した2粒子の相関性を検証した.
結論:
- 開発された技術は,ローカルな操作を通じて遠隔量子ビットを動的にエンタグリングするための枠組みを提供します.
- この方法は,大規模な量子レジスタと任意のスピン絡み状態に適用できます.
- 量子情報科学の進歩の可能性を高めています
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