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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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機械運動の測定ベースの量子制御
Massimiliano Rossi1,2, David Mason1,2, Junxin Chen1,2
1Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
Nature
|November 2, 2018
まとめ
研究者は,膜共振器の測定ベースの量子制御を達成しました.
科学分野:
- 量子力学について
- オプトメカニクス
- 量子制御
背景:
- 量子システムの制御は 測定バックアクションによって妨げられます
- 効率的な測定は 情報獲得と 干渉のバランスをとります
- リアルタイムのフィードバックで バックアクションを緩和し 量子状態を制御できます
研究 の 目的:
- 運動の自由度に関する測定ベースの量子制御を証明する.
- ミリメートルサイズの膜共振器に量子制御技術を適用する
主な方法:
- オプトメカニカル・トランスデューサを使って 振動器の動きを測った
- 高い測定効率を達成し,統一に近い.
- 電子フィードバックループを使って リアルタイムで力を発揮します
主要な成果:
- 膜共振器を量子基底状態 (0.29熱占用) に冷却した.
- 9デシベルの冷却を 量子バックアクションの限界以下で達成した
- 環境に比べて6度 熱の占有量が減りました
結論:
- 測定による運動の量子制御を成功裏に実証しました
- 位置とモメンタムの自由度に対する 拡張量子制御
- 量子情報処理と重力波検出の 可能性が生まれました
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