衛星ベースのエンタグリングの分布は1200キロメートル
Juan Yin1,2, Yuan Cao1,2, Yu-Huai Li1,2
1Department of Modern Physics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
まとめ
衛星ベースの量子ネットワークは,以前の距離制限を克服して1203km以上の長距離の絡み合い分布を達成しました. この画期的な発見により 基礎となる量子物理のテストや 拡張可能な量子ネットワークが可能になりました
科学分野:
- 量子物理学
- 量子通信ネットワーク
背景:
- 遠距離の絡み合い分布は 量子物理学のテストや 量子ネットワークに不可欠です
- 以前の距離制限 (~100 km) は主にチャネル損失によるものでした.
研究 の 目的:
- 先例のない距離で 絡み合った光子の配列を 衛星で示すために
- 地上ファイバーベースの 絡み合いの分布の限界を克服する.
主な方法:
- 絡み合った光子のペアを 配送する衛星プラットフォームを利用した.
- 異なる長さ (1600〜2400 km) の2つの衛星から地上へのダウンリンクを使用した.
- 厳格なアインシュタインの局所条件を測定するために確保した.
主要な成果:
- 2つの地上の場所の間に 1203 km 以上の間に 絡み合った光子ペアを成功裏に分配した.
- 2フォトンの絡み合いが 確認されました
- ベル不等式 (2.37 ± 0.09) の違反が観測され,量子相関が確認されました.
- 直接のファイバー送信と比較して,かなり高い効率のリンクを達成しました.
結論:
- 衛星による配送は 遠隔量子エンタグメントの 実行可能な方法です
- この技術は先ほどの距離の制限を克服し グローバルな量子ネットワークの道を開きます
- この結果は 量子力学の基礎テストを 長期に渡って 支持しています
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