機械的な振動器を備えた量子力学のないサブシステム
Laure Mercier de Lépinay1, Caspar F Ockeloen-Korppi1, Matthew J Woolley2
1QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
Science (New York, N.Y.)
|May 7, 2021
まとめ
研究者は2つのマイクロメカニカルオシレータを使用して,オシレータ測定中に量子反作用をバイパスする量子力学フリーサブシステムを開発しました. この突破は弱い力を検知し 非古典的な状態を生成する精度を高めます
科学分野:
- 量子力学について
- 量子光学
- オプトメカニクス
背景:
- 量子力学は測定精度に 根本的な限界を課しています
- 振動器の位置の連続的な測定は,量子反作用の対象となります.
- 弱い力を検出し,非古典的な状態を生成することは,これらの制限のために困難です.
研究 の 目的:
- 量子反作用を回避しながら オスチレータを測定する方法を示します
- 組み合わせたマイクロメカニカルオシレータを用いた量子力学のないサブシステムを実現する.
- このサブシステムの測定ノイズの削減と量子エンタグリングの確認の有効性を検証する.
主な方法:
- 2つの結合された物理微力振動器から効率的な振動器を構成する.
- 結合システムの集合二乗の測定を行う.
- 量子反作用の回避と 絡み合いを定量化する
主要な成果:
- 量子力学のない測定を 8デシベルで回避した
- 完全な量子限界の2の因数で得られた総騒音.
- 2つの振動器の間の量子交絡が 直接確認され ドゥアン数値は 分離能力の限界より 1.4デシベル低い
結論:
- 開発された量子力学のないサブシステムは,測定の反作用を効果的に軽減します.
- この技術は,弱い力の検出と非古典的な運動状態の生成/測定を容易にする.
- 検証された量子エンタグリングは 量子情報処理と計測の先駆けとなります
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