固体状態のシステムでフィード・フォワードによる決定的量子テレポーテーション
L Steffen1, Y Salathe, M Oppliger
1Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland. lsteffen@phys.ethz.ch
Nature
|August 20, 2013
まとめ
研究者らは,超伝導回路を用いた決定的量子テレポーテーションを実証した. この量子情報科学の突破は,マクロスコーピック量子システム間の高精度状態転送を可能にし,量子通信ネットワークの道を開く.
科学分野:
- 量子情報科学とは,量子情報科学である.
- 超伝導回路について
- 量子コンピューティング
背景:
- 超伝導回路を用いたマクロスコーピック量子システムは,量子情報科学の鍵となる.
- 現在のシステムは,基本的な論理ゲート,絡み合った状態,およびエラー修正を可能にします.
- 高精度単量子ビットの読み取りは,フィードバック制御に不可欠です.
研究 の 目的:
- チップベースの超伝導回路でフィードフォワードによる完全な決定的量子テレポーテーションを実現する.
- 精密な制御のために,高度な読み取り技術と柔軟なデジタルエレクトロニクスを利用します.
- 複雑な回路アーキテクチャのためのクロス量子バス技術の可能性を調査する.
主な方法:
- 2つのパラメトリック増幅器のセットを使用し,結合および個々の量子ビットの単発読み出しを使用しました.
- 制御のための統合された柔軟なリアルタイムデジタル電子機器.
- 任意の接続性を持つ平面回路アーキテクチャのクロス量子バス技術を活用しました.
主要な成果:
- 超伝導回路のフィードフォワードで完全な決定的量子テレポーテーションを達成しました.
- 量子状態の高精度テレポーテーションが,マクロシステム (距離6mm) 間で10^4s^-1.0の速度で実証された.
- このプロセスは,任意の入力状態のほぼ単位の確率で成功しました.
結論:
- 実証された量子テレポーテーションスキームは,非常に効率的でスケーラブルです.
- 超伝導波導体は低伝送損失を提供し,より長い距離の量子通信を可能にします.
- フィード・フォワード・テクニックは,量子エラー補正アプリケーションの有望性を示しています.
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