単一の原子から絡み合ったマルチフォトングラフ状態の効率的な生成
Philip Thomas1, Leonardo Ruscio2, Olivier Morin2
1Max-Planck-Institut für Quantenoptik, Garching, Germany. philip.thomas@mpq.mpg.de.
Nature
|August 24, 2022
まとめ
研究者は 穴内の単一の原子を使って フォトンの絡み合いを生み出す 決定的方法を開発しました この突破により 量子コンピューティングと通信に不可欠な 複雑な状態の生成が速くなります
科学分野:
- 量子科学と技術
- 量子情報処理
- フォトニックエンタグリング
背景:
- 量子効果は量子コンピューティングや コミュニケーションや センシングの鍵です
- デコエレンスと確率的エンタグレメント生成方法により,スケーラビリティの課題が存在します.
- 光学フォトンは,その強度と操作性のために理想的な量子ビットキャリアです.
研究 の 目的:
- フォトンの絡み合いを生成する 決定的プロトコルを実行する
- 確率的エンタグレメント生成の限界を克服するために
- 量子応用のための 大規模な絡み合いの状態を 作り出すために
主な方法:
- 単一のメモリ原子を光学カビで利用する.
- 制御された単光子の放出と 原子量子ビットの回転を交互に
- 絡み合いの生成のための決定的プロトコルを使用します.
主要な成果:
- グリーンベルガー・ホーン・ゼイリンガー (GHZ) 状態で最大14の光子と最大12の線形クラスター状態を生成した.
- GHZ州では76~6%,クラスター州では56~4%の忠誠度を達成した.
- 源から検出までの高い効率 (43.18~7%) を示し,大型の状態を1分あたり約1回測定することができる.
結論:
- 決定的プロトコルは,確率的メソッドのスケーラビリティの制限を克服します.
- 大きな絡み合っている状態の急速な生成率は,以前の実験よりも数桁速くなります.
- この研究は,スケーラブルな測定ベースの量子計算と通信の道を開きます.
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