強く相互作用する格子時計における衝突シフトの抑制

Matthew D Swallows¹, Michael Bishof, Yige Lin

¹JILA, National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA.

Science (New York, N.Y.)

|February 5, 2011

まとめ

研究者は,強い原子相互作用を使用して,ストロンチウム格子時計の周波数シフトを減少させた. この突破は,多原子原子時計の精度と精度の両方を向上させ,将来の改良への道を開く.

科学分野:

原子物理原子物理学
量子計測学とは,量子計測学のことです.
オプティカル・アトム・クロック

背景:

光学格子時計は,多くの原子を同時に尋問することにより,高周波の安定性を提供します.
原子相互作用は,フェルミオン原子時計でも,体系的な不正確さ,特に密度依存の周波数シフトを導入することができます.
衝突シフトは,多原子系において,高精度と精度の両方を達成する上で課題となる.

研究の目的:

光学格子時計における密度依存周波数シフトを抑制する方法を調査する.
衝突シフトを緩和する強力な原子相互作用の有効性を実証する.
多原子ストロンチウム格子時計の精度を向上させるため.

主な方法:

ストロンチウム格子時計システムを利用しました.
衝突周波数シフトを抑制するために強力な原子相互作用を使用した.
フェルミオン原子の大集団を同時に尋問した.

主要な成果:

ストロンチウム格子時計の衝突周波数シフトを成功裏に減少させました.
衝突周波数シフトの不確実性を 10 〜 17 レベルに低下させた.
強い相互作用が多原子格子部位のシフトを抑制することが示された.

結論:

強い原子相互作用の使用は,多くの粒子原子時計の精度と精度の間の妥協を効果的に排除します.
このアプローチは,尋問された原子の数が増加するにつれて,精度と正確性の両方を同時に改善することを可能にします.
この発見は,より正確で精密な光学格子時計の道を開く.

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