強烈に駆動された超伝導量子ビットにおけるマッハ-ゼンダー干渉計
William D Oliver1, Yang Yu, Janice C Lee
1MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02420, USA. oliver@ll.mit.edu
まとめ
私たちは,超伝導フルス量子ビットを使用してマッハ・ゼンダー型干渉測定を実証します. この量子干渉法により,クイビット操作と特徴付けは,強力に駆動された状態で可能になります.
科学分野:
- 量子コンピューティング
- 超伝導回路について
- 量子光学とは,量子光学である.
背景:
- 超伝導フルス量子ビットは,異なる基底状態と興奮状態を持つ調節可能な人工原子です.
- これらの状態は,量子操作の重要な特徴である回避された交差を示します.
- 量子ビットの強いハーモニック・ドライビングは,この回避された交差点を周期ごとに2回通過させる.
研究 の 目的:
- 超伝導フルス量子ビットにおけるマッハ・ゼンダー型干渉測定を実証する.
- ランドー-ゼナー変換によって生成される量子干渉フリンジを探求する.
- 強烈に駆動されたレジームで量子ビットを操作し,特徴付けるための代替方法を提供すること.
主な方法:
- 超伝導フルス量子ビットによるマッハ・ゼンダー型干渉計を用いて.
- 量子ビットを回避された交差点を通過させるために強力な調和刺激を使用します.
- 段階蓄積のための一貫したビームスプリッターとしてランドー-ゼナー変換を活用する.
主要な成果:
- 観測された量子干渉のフリンジは,1から20個の光子を含むトランジションについて.
- 蓄積された相がマイクロ波振幅によって変化することを示した.
- キュービット相空間における光学的なマッハ=ゼンダー干渉計の一般化を示した.
結論:
- マッハ・ゼンダー型干渉計は,超伝導フルス量子ビットでは実現可能である.
- このテクニックは,量子ビットの操作と特徴化の新しいアプローチを提供します.
- この研究は,強烈に駆動された体制における量子ビットダイナミクスの量子光学的性質を強調している.
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