量子プロセッサとリアルタイム通信の組み合わせ
Almudena Carrera Vazquez1, Caroline Tornow1,2, Diego Ristè3
1IBM Quantum, IBM Research Europe - Zurich, Rüschlikon, Switzerland.
Nature
|November 20, 2024
まとめ
研究者は2つの量子プロセッサを リアルタイムでクラシックな接続で 実験的に結びつけました これは,エラーを軽減したダイナミック回路を可能にし,ハードウェアの制限を克服することによって,より大きく,より汎用的な量子状態を作成します.
科学分野:
- 量子コンピューティング
- 量子情報科学
背景:
- 現在の量子ハードウェアは 騒々しい量子ビットや 短時間のコヒーレンスや 平面的な接続性によって 制限されています
- 多くの量子アプリケーションには,単一の量子処理ユニット (QPU) で利用できるよりも多くの量子ビット接続性と量子ビットが必要です.
- クラシック通信で複数のQPUを接続することは提案された解決策ですが,実験的な証拠がありません.
研究 の 目的:
- 複数の QPU を使用して周期的な接続性を要求する量子状態の作成を実験的に実証する.
- 誤差を軽減したダイナミック回路と,強化された量子計算のための回路切断の使用を検証する.
- 条件付き量子ゲート操作のためのQPU間のリアルタイムクラシックリンクを確立する.
主な方法:
- 誤差を軽減したダイナミック回路を導入し,中間回路の測定に基づく古典的な制御を行います.
- 複数の量子処理ユニット (QPU) で量子状態を構築するために回路切断を使用した.
- QPU間の条件操作を可能にするために,2つのQPU (それぞれ127クビット) を接続するリアルタイムクラシックリンクを確立しました.
主要な成果:
- 2つのQPUで最大142クビットを使用した周期的な接続を必要とする量子状態を成功裏に作成しました.
- QPU間のリアルタイム条件付き量子ゲート操作を測定結果に基づいて実証した.
- エラーを軽減した制御フローを介して強化された量子ビット接続と命令セットを展示しました.
結論:
- 複数の量子プロセッサを統合して より強力な量子コンピュータとして利用できます
- リアルタイムのクラシックリンクによって可能になったエラーを軽減したダイナミック回路は,量子コンピューティングの汎用性とスケーラビリティを大幅に高めます.
- この実験的実現は ハードウェアの制約により 以前は解決できなかった 複雑な量子問題への道を開きます
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