量子ネットワーク上のリモートエンタグリングの決定的配信
Peter C Humphreys1, Norbert Kalb1, Jaco P J Morits1
1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands.
Nature
|June 15, 2018
まとめ
研究者は量子ネットワークのための 高速の絡み合いプロトコルを開発しました この突破により 決定的なリモートエンタグリング生成が可能になり 安全な通信と分散量子コンピューティングの 重要なステップとなります
科学分野:
- 量子情報科学
- 量子ネットワーク
- 量子コミュニケーション
背景:
- 大規模な量子ネットワークでは,ノード間の高度な絡み合いの発生率が求められ,デコヘレンスが克服されます.
- 現在の2ノード量子ネットワークは 絡み合い分布の効率に 限界があります
- 先進的な量子応用には 決定的リモートエンタグリングが不可欠です
研究 の 目的:
- スケーラブルな量子ネットワークのための 高速の決定的エンタグリングプロトコルを示します
- リモートノードの脱コエレンス率を超えたエンタグリング生成率を上回る.
- 将来のマルチノード量子ネットワークの 重要な構成要素を確立する
主な方法:
- ダイヤのスピン量子ビットのノードが 2m 隔てられている
- シングルフォトンの 絡み合いのプロトコルを 導入した
- 絡み合っている状態の脱合率を抑制するために動的脱合を使用した.
主要な成果:
- 過去の方法よりも3度高い 39Hzまでのエンタグリング生成率を達成しました.
- リモートエンタグリング状態の解消率を5Hzに抑えた.
- 100ms毎に>0.5の精度で,リモートエンタグリング状態の決定的配信が実証されています.
結論:
- 開発されたプロトコルは,量子ネットワークの絡み合い分布における主要な制限を克服します.
- この研究は 拡張されたマルチノード量子ネットワークの構築に 重要な要素となります
- セキュアな通信,分散量子コンピューティング,エンタグリング分布による 強化されたセンサーを可能にします.
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