フェルミ変性三次元光学格子時計
S L Campbell1,2, R B Hutson1,2, G E Marti1
1JILA, National Institute of Standards and Technology (NIST) and University of Colorado Boulder, 440 UCB, Boulder, CO 80309, USA.
Science (New York, N.Y.)
|October 7, 2017
まとめ
ストロンチウム光学格子時計は,変性フェルミガスを3D格子で使用することで,より高い精度を達成します. この方法は原子相互作用を解決し,密度に依存する周波数シフトを減らし,時計の安定性と精度を向上させます.
科学分野:
- 原子物理学
- 量子メトロロジー
- 光学時計
背景:
- ストロンチウム光学格子時計は 何百万もの原子を調査することで 高い精度を提供します
- 原子相互作用は,密度依存の周波数シフトにより,時計の精度を制限します.
- これまでの方法では 時計の安定性と精度との間のトレードオフに 直面していました
研究 の 目的:
- ストロンチウム光学格子時計の精度を向上させるためのスケーラブルなソリューションを開発する.
- 原子相互作用によって引き起こされる密度依存の周波数シフトを緩和する.
- 原子時計の比較でより高い精度を達成するために.
主な方法:
- 変性フェルミガスを 3次元光学格子で利用する
- 原子密度の高さを利用して 相互作用のシフトを最小限に抑える
- 格子領域間の同期クロック比較を実行する.
主要な成果:
- コントラクトの相互作用を解決し,クロックシフトへの貢献を減らす方法を示した.
- 前回の実験より 大きさの順序を低くした.
- 1時間で5 × 10−19の測定精度を得ました.
結論:
- 高精度な原子時計のスケーラブルなソリューションを 提供しています
- このアプローチは,以前の制限を克服し,現場での相互作用のシフトを効果的に防ぎます.
- 証明された精度は 光学時計技術の 重要な進歩を表しています
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