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量子テレポーテーションと絡み合い分布は,100キロメートルの自由空間チャネルにわたって行われます
1Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
Nature
|August 10, 2012
まとめ
研究者は,自由空間チャネルを使用して97kmを超える独立した量子ビットの量子テレポーテーションを達成しました. この画期的な進歩は,安全な量子通信と分散型量子ネットワークを進めて,グローバルな量子システムへの道を開く.
科学分野:
- 量子物理学とは,量子物理学のことです.
- 量子コミュニケーションとは
- 量子情報科学とは,量子情報科学である.
背景:
- 量子状態の移転は,量子ネットワークにとって極めて重要です.
- 光ファイバーは,光子損失や脱コエレンスなどの制限に直面しています.
- フリースペースチャネルは,遠距離量子通信の有望な代替手段である.
研究 の 目的:
- 97キロメートルの自由空間チャネルを介して独立した量子ビットの量子テレポーテーションを実証するために.
- 101.8キロメートルの2リンクチャネルで絡み合いの分布を達成するために.
- グローバルな量子ネットワークと衛星ベースの量子通信の発展を進めること.
主な方法:
- 量子テレポーテーションのためのマルチフォトンエンタグリングを利用した.
- キュービット転送のために97キロメートルのワンリンクフリースペースチャンネルを使用した.
- 双リンクチャネルで示された絡み合いの分布.
- 高頻度,高精度の取得,指針,追跡技術を実装しました.
主要な成果:
- 独立した量子ビットの量子テレポーテーションを達成し,6つの異なる状態で平均フィデリティは80.4% ±0.9%でした.
- 2つのリンクチャネルを介して,合計101.8キロメートルの距離に,成功裏に絡み合いを分散しました.
- Clauser-Horne-Shimony-Holt不等式の違反が観察され,局所の抜け穴なしに量子相関が確認されました.
結論:
- この結果は,グローバルな量子ネットワークの構築に向けた重要な前進を意味しています.
- 開発された指針と追跡技術は,将来の衛星ベースの量子通信に適しています.
- この研究は,大規模な量子力学の基本的なテストに寄与しています.
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