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冷たい原子を用いたニュートンの重力定数の精度測定
G Rosi1, F Sorrentino1, L Cacciapuoti2
1Dipartimento di Fisica e Astronomia and LENS, Università di Firenze - INFN Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy.
Nature
|June 27, 2014
まとめ
科学者たちは,レーザーで冷却された原子による量子干渉計を用いてニュートンの重力定数 (G) を正確に測定した. この新しい方法は,より正確なG値を提供し,基礎物理学と宇宙学の研究を支援します.
科学分野:
- 物理 物理学 物理学とは
- メトロロジー・メトロロジー
- 量子力学は,量子力学という
背景:
- ニュートンの重力定数 (G) の決定は,実験上の困難や不一致のために困難でした.
- 以前のG測定では,主にマクロスコプ的質量とトルションペンデュームの方法が用いられ,精度が制限されていた.
研究 の 目的:
- ニュートンの重力定数 (G) の値を,新しい量子アプローチを用いて正確に決定する.
- 以前のG測定で一般的だった体系的なエラーに対処し,Gの値に対する信頼を高めるため.
主な方法:
- レーザーで冷やされた原子と量子干渉計を用いて,G.の新しい測定を行いました.
- 捉え難い体系的エラーを特定するために概念的に異なる実験セットアップを使用しました.
主要な成果:
- Gの正確な値が得られました: 6.67191(99) × 10−11 m3 kg−1 s−2.2.
- CODATA値から1.5標準偏差で異なる値で,百万分の150の相対的な不確実性を達成しました.
結論:
- 量子インターフェロメトリー法により,G.のより正確な測定が可能になります.
- Gの精度の向上は,重力理論,宇宙学,粒子物理学,天体物理学,地質物理学において極めて重要です.
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