アインシュタイン-ポドルスキー-ローゼン絡み合いの調整可能な遅延
A M Marino1, R C Pooser, V Boyer
1Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland 20899, USA. alberto.marino@nist.gov
Nature
|February 13, 2009
まとめ
研究者は,アインシュタイン-ポドルスキー-ローゼン (EPR) 絡み合った光のための調整可能な光学遅延を使用して,量子相関を遅らせる方法を実証しました. この画期的な発見は,将来の量子ネットワークと画像処理のための量子メモリ能力を向上させます.
科学分野:
- 量子光学とは,量子光学である.
- 量子情報科学とは,量子情報科学である.
- 原子力蒸気システム
背景:
- 絡み合ったシステムは,コンピューティングや通信などの量子技術にとって不可欠な非古典的な相関を示す.
- 量子記憶を必要とするエンタグレメント転送の制御は,量子ネットワークの開発に不可欠です.
- アインシュタイン-ポドルスキー-ローゼン (EPR) 絡み合いを遅らせることは,量子記憶性能の重要な基準です.
研究 の 目的:
- EPRの絡み合った光束の光学的に調整可能な遅延を示すために.
- 遅延プロセス中の量子相関の保存を調査する.
- 画像のための量子記憶への基礎的なステップを確立する.
主な方法:
- 熱いルビジアム-85 (Rb) 蒸気中のダブルラムバダ方式の4波混合プロセスを利用しました.
- 絡み合った光の遅延期間を制御するために,光学的に調節可能なパラメータを使用します.
- 遅延を定量化し,絡み合いの保存を評価するために,交差相関関数を測定しました.
主要な成果:
- EPRの絡み合った光束に対して,有意な,光学的に調整可能な遅延を達成しました.
- 遅延後の絡み合ったビーム内の量子空間的相関の保存が実証されました.
- 絡み合った画像を成功裏に遅らせ,画像ベースの量子記憶のためのシステムの可能性を披露しました.
結論:
- Rb蒸気で開発された4波混合システムは,EPRの絡み合いのための調節可能な量子メモリを提供します.
- この方法は,重要な量子相関を保持し,堅固な量子情報伝送の道を開く.
- 実践的な量子記憶,特に絡み合った画像に対する重要な進歩を表しています.
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