表面音波フォノンの量子制御
K J Satzinger1,2, Y P Zhong2, H-S Chang2
1Department of Physics, University of California, Santa Barbara, CA, USA.
Nature
|November 23, 2018
まとめ
科学者はマクロスケールメカニカル共振器の完全な量子制御を達成し,非古典的な状態を生成しました. 量子物理学におけるこの突破は 新しい量子感知と計算の応用を可能にします
科学分野:
- 量子物理学
- 量子力学
- カビティ・オプトメカニクス
背景:
- 非古典的な量子状態と重置は 量子物理学の特徴で イオンや光子のようなシステムで示されています
- 機械システムでの以前の実証は間接的であり,線形反応と低周波によって制限され,量子基礎状態へのアクセスを妨げました.
- 機械システムは量子センシング,計算,通信の 可能性を秘めています
研究 の 目的:
- マクロスケールメカニカル共振器の 機械状態の完全な量子制御を 示すために
- 機械システムで非古典的な量子状態を生成し,正確に操作する.
- 機械的共振器を量子状態で利用できるようにする
主な方法:
- 表面音波 (SAW) 共鳴器を超伝導量子ビットと強く結合する.
- 超伝導量子ビットを使って 量子状態を制御し 機械的共振器で測定する
- 状態のマッピングと特徴づけのためにウィーガー断層撮影を使用する.
主要な成果:
- マクロスケール共振器の 機械的状態の完全な量子制御を達成しました
- 0と1のフォック状態の非古典的重置を生成した.
- 量子状態のマッピングに成功しました
結論:
- マクロスケールメカニカル共振器の 精密でプログラム可能な量子制御を証明した.
- この能力は 量子限界における 表面音波の応用を進める上で 極めて重要です
- 異なる量子システムを結合し,新しい量子技術を開発する可能性を広げています.
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