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ミリメートルスケールの原子サンプルで重力赤偏移の解明
Tobias Bothwell1, Colin J Kennedy2,3, Alexander Aeppli2
1JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, CO, USA. tobias.bothwell@colorado.edu.
Nature
|February 17, 2022
まとめ
科学者は,超冷たいストロンチウム原子の重力赤色移転を測定し,アインシュタインを確認しました.
科学分野:
- 原子物理学
- 一般相対性理論
- 量子力学について
背景:
- アインシュタインの相対性理論は 重力の赤方位を予測し 時計は異なる重力波で異なる速度で動きます
- 原子時計は,様々な距離スケールで一般相対性理論をテストするために不可欠です.
- 将来の原子時計は 一般相対性理論と量子力学の交差点を探求することを目的としています
研究 の 目的:
- 超冷たいストロンチウム原子のミリスケールサンプル内の重力赤色移転を測定する.
- 原子時計の感度を向上させ 基礎物理学を研究する
主な方法:
- ミリメートルスケールのサンプルで超冷たいストロンチウム原子を使用した.
- 分数周波数測定の不確実性は7. 6 × 10−21で,10倍以上の改善を達成しました.
- 重力赤偏移と一致する 線形周波数グラデーションを測定した
主要な成果:
- ミリメートルスケールのサンプルで 測定可能な重力赤偏移を証明した
- 原子時計の周波数で前例のない測定不確実性を達成した.
- 重力ポテンシャルによる 線形周波数グラデーションを観測した.
結論:
- この結果は アインシュタインの 重力赤偏移の予測を ミリメートルスケールで確認しました
- この進歩は 原子時計の新たな時代を切り開き 重力効果のサンプル内修正を 要求します
- 原子時計が量子重力の仕組みを 探求する道を開くのです
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