半分のスケールの原子相関性とピンチ時計の高い相対的安定性

Aaron W Young^1,2, William J Eckner^1,2, William R Milner^1,2

¹JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO, USA.

Nature

|December 17, 2020

まとめ

光学ピンチでストロンチウム-88の原子を使って大規模でコヒーレントな原子組を作りましたこれによって高精度量子計測とシミュレーションが可能になり原子相関度が前代未聞です

科学分野:

量子科学と技術
原子物理学
量子測定法

背景:

大規模で一貫した量子システムの準備は量子計測学,シミュレーション,情報に不可欠です
低エントロピー,高コヒーレンス,および大規模なアンサンブルを同時に達成することは,依然として重要な課題です.

研究の目的:

ピンチで閉じ込められた原子の光学ポテンシャルを調整するためのハイブリッドアプローチを開発する.
スケーラビリティ,高精度状態の準備,サイト解析の読み出し,コヒーレンス保存のバランスをとる.

主な方法:

ピンチで閉じ込められたアルカリ土 (ストロンチウム-88) の原子を使用した.
ハイブリッドのアプローチで光学的な潜在力を調整した.
場所の解像度の読み取りと原子相関性の保存を達成しました.

主要な成果:

捕獲と興奮状態の寿命は,約150個の原子の集合で40秒を超えています.
半分のスケールで光学時計への移行で実証された原子相関性 (品質因数> 10^16).
時計の比較では,5.2 ((3) × 10^-17 τ^-1/2 の相対的な周波数安定を達成した.

結論:

開発された方法は,主要な原子システムと比較して,量子プロジェクションノイズを大幅に削減します.
このアプローチは,長寿命の設計された絡み合いのための道を切り開きますオーダーメイドの原子配列の光学時計の移行です

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