1つの光子によって告知された約3,000個の原子の負のウィーナー関数との絡み合い
Robert McConnell1, Hao Zhang1, Jiazhong Hu1
1Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nature
|March 27, 2015
まとめ
研究者は,単一の光子を使用して,大規模な原子アンサンブルでノンガウスの絡み合いを生成しました. この有名な方法は負のウィーナー関数を作り,何千もの原子に対する前例のない量子制御を示した.
科学分野:
- 量子物理学とは,量子物理学のことです.
- 原子物理学 原子物理学とは
- 量子情報科学とは,量子情報科学である.
背景:
- 多くの粒子の絡み合っている状態は,量子情報,コンピューティング,計測学にとって極めて重要です.
- 以前の大規模なアンサンブルで絡み合った状態は,ガウス式であり,アプリケーションを制限していました.
- ノン・ガウスの絡み合っている状態は,以前は小さなシステムに限られていた.
研究 の 目的:
- 大量の原子の集合体の中で,非ガウスの絡み合いを生成する.
- 複雑な量子状態を生成するための方法を示す.
- 大規模なシステムで負のウィーゲンナー関数を得るため.
主な方法:
- 弱いレーザーパルスとの大きな原子組の相互作用.
- シングルフォトン検出は,絡み合った状態を予告します.
- ウィナー準確率分布関数の再構築.
主要な成果:
- シングルフォトン検出による3,000以上の原子の絡み合いの生成.
- 非古典性を示す,負の値のウィーガー関数の再構築.
- 2,910 ± 190 の原子の絡み合い深さの検証.
結論:
- 前例のない非ガウスの絡み合いと,大きな原子組で負のウィーナー関数を達成した.
- 大規模な量子システムにおける,予告された絡み合いの生成の力を実証した.
- 量子計量学と情報処理のための高度な状態を生成するための道を開いた.
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