回路量子電動学の値で動作するボロメーター
R Kokkoniemi1,2, J-P Girard1, D Hazra1,3
1QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, Espoo, Finland.
Nature
|October 1, 2020
まとめ
研究者らは量子技術を活用する グラフェンボロメーターを開発しました この非常に敏感な熱センサーはナノ秒の時間定数と優れたエネルギー解像度を達成し,回路量子電動学のアプリケーションの重要な値を満たしています.
科学分野:
- 量子技術
- センサー開発
- 材料科学
背景:
- 熱センサーはガス検知やセキュリティなどに不可欠です
- 新興の量子技術,特に回路量子電動力学では 高感度で速い検出器が必要です
- 既存の熱センサーは,回路量子電動学の厳格な時間常数とエネルギー解像度要件を満たしていません.
研究 の 目的:
- 電子回路量子電動学の値を満たすことができるボロメーターを実験的に実証する.
- 数百ナノ秒の時間定数と約10のプランク定数 (h) のエネルギー解像度を持つ熱センサーを開発する.
- ボロメーターの性能を向上させるための新しい材料を活用する.
主な方法:
- ボロメーターの活性材料として,非常に低い比熱を持つグラフェン単層を使用した.
- 同じ装置で,ノイズ等価の電力と熱時間常数を直接測定した.
- 実験データに基づいたカロメトリックエネルギー解像度を特徴づけた.
主要な成果:
- 電子回路の量子電動学の値で動作するボロメーターを示した.
- "平方根ヘルツあたり30ゼプトワットの 騒音等価の電力を 達成しました
- 熱時間定数は500ナノ秒で,以前の制限より2桁短く,最低観測時間定数は200ナノ秒であった.
- 30のプランク定数 (h) のカロメトリックエネルギー解像度が決定された.
結論:
- 開発されたグラフェンボロメーターは,回路量子電動学のアプリケーションの重要な性能の値を満たしています.
- センサーの高速応答時間と高エネルギー解像度は,超伝導量子ビットと読み取りスキームとの統合を可能にします.
- この進歩は 量子コンピューティングと センシングの発展の道を開きます
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