非古典的な空洞場状態の再構築と,その脱コエレンス状態のスナップショット

Samuel Deléglise¹, Igor Dotsenko, Clément Sayrin

¹Laboratoire Kastler Brossel, Ecole Normale Supérieure, CNRS, Université Pierre et Marie Curie, 24 rue Lhomond, 75231 Paris Cedex 05, France.

Nature

|September 27, 2008

まとめ

研究者らは,閉じ込められた光子の量子状態を再構築し,相関性,フォック,シュロディンガーの猫状態を視覚化しました. この方法は,量子-古典的な境界と量子システムにおける非相関性の理解を前進させる.

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.
洞穴量子力学量子電動力学

背景:

量子状態の再構築は,量子システムと量子-古典的な境界を理解するために重要である.
閉じ込められた光子の状態を再構築することは,長寿命の空洞の必要性のために実験的に困難です.

研究の目的:

洞穴に閉じ込められた様々な量子放射線状態の完全な再構築と絵画表現を達成するために.
量子-古典的境界を調査し,量子状態に対するデコエレンス効果を研究する.

主な方法:

フォトンが繰り返し測定するのに十分な長期間生き残る穴を利用しました.
閉じ込められた放射線場に関する情報を抽出するために,空洞を横切る単一の原子を使用しました.
密度行列とウィナー関数を使って量子状態を再構築した.

主要な成果:

閉じ込められた光子の相関状態,フォックの状態,シュロディンガーの猫の状態を再構築し,視覚化しました.
フォックとシュロディンガーのキャット状態の振動と負性を持つ観察されたウィーガー関数,量子干渉を示す.
シュレーディンガー猫の状態の連続的なスナップショットを再構築することによって,モニタリングされたデコエレンス.

結論:

開発された再構築手順は,光学空洞における量子状態とその動態の詳細な研究を可能にします.
この技術は,フォトニックシステムのデコエレンスと量子フィードバック制御に関する将来の研究に価値があります.

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