物質と光との間の量子状態の移転
1School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Science (New York, N.Y.)
|October 23, 2004
まとめ
研究者らは,原子から単一の光子への一貫した量子状態移転を達成しました. 絡み合った光子と冷たい原子を用いたこの量子記憶と回収方法は,量子ネットワークの鍵です.
科学分野:
- 量子情報科学とは,量子情報科学である.
- 原子物理 原子物理学
- 量子光学とは,量子光学である.
背景:
- 量子状態の移転は,量子情報処理に不可欠です.
- エンタグメントベースのプロトコルは,量子情報転送のための堅牢な方法を提供します.
研究 の 目的:
- 2階層の原子系から単一の光子への一貫した量子状態の移転を実証する.
- 望ましい量子状態に原子組を投影するためにエンタグレメントを利用する.
- 単光子放射による原子量子ビットの効率的な読み取りを可能にするために.
主な方法:
- 単一の信号光子と冷たいルビジアム原子の2つの構成要素のアンサンブルの間の絡み合いを使用します.
- 原子アンサンブル (量子記憶) を,信号光子測定によって特定の状態に投影する.
- キュービット読み取りのための集団原子状態からアイドルフォトンの方向性放出を刺激する.
主要な成果:
- 原子系から単一の光子へのコヒーレント量子状態の成功移行.
- 原子量子ビットの忠実な準備と読み取りを実証しました.
- 信号とアイドルフォトンの間の相関が観測され,転送の精度が確認されました.
結論:
- 開発された方法は,原子集合と単一の光子間の高精度量子状態転送を可能にします.
- この研究は,分散量子ネットワークを実装するための道を開く.
- この技術は,量子記憶と回収のための堅牢なプラットフォームを提供します.
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