量子ネットワークにおける決定的マルチキビットエンタグリング
Youpeng Zhong1,2, Hung-Shen Chang1, Audrey Bienfait1,3
1Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA.
Nature
|February 25, 2021
まとめ
超伝導量子プロセッサを繋ぐ 量子ネットワークを開発しました この画期的な発見は 決定的マルチキビット 絡み合いの分布を可能にします これはスケーラブルな量子コンピューティングと 通信ネットワークに不可欠です
科学分野:
- 量子情報科学
- 量子コンピューティング
- 量子通信ネットワーク
背景:
- 高精度分散型マルチキビット・エンタグリングは 量子ネットワークにとって不可欠です
- 以前は2つの量子ビットに 限定されていました
- ステート・トランスファー・フィデリティの難しさは,マルチ・キュービット・エンタグレメント・ディストリビューションを妨げました.
研究 の 目的:
- 超伝導量子ノード間の量子状態の決定的移転を証明する.
- グリーンベルガー-ホーン-ゼイリンガー (GHZ) 状態を準備し,転送する.
- 大規模な量子コンピューティングのためのモジュールアーキテクチャを確立する.
主な方法:
- 2つの超伝導ノードをコアキシアルケーブルで 接続した量子ネットワークを作りました
- 各ノードは3つの相互接続された超伝導量子ビットを含んでいます
- 接続ケーブルを介してクイビット対クイビット状態の直接転送を実行します.
主要な成果:
- ノード間の状態転送プロセスのフィデリティは0.911 ±0.008を達成した.
- 0.656 ± 0.014の信頼性で 3 キビットGHZ状態を成功裏に転送しました.
- 0.722 ± 0.021の忠誠度で6キビット,2ノードGHZ状態を生成し,多部分の絡み合いの値を超えました.
結論:
- 開発された量子ネットワークアーキテクチャは,超伝導量子プロセッサの一貫したリンクを可能にします.
- 物理的なリンク上の決定的マルチキビットエンタグレメント分布を証明した.
- 大規模な量子コンピュータを構築するための実行可能なモジュラーアプローチを提供します.
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