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Fabrication of Uniform Nanoscale Cavities via Silicon Direct Wafer Bonding
Published on: January 9, 2014
超伝導クビットを空洞バスで結合する
J Majer1, J M Chow, J M Gambetta
1Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA. johannes.majer@yale.edu
Nature
|September 28, 2007
まとめ
研究者らは,遠隔の超伝導クビットをつなぐためにマイクロ波光子を用いた量子バスを開発した. これは,スケーラブルな量子コンピューティングアーキテクチャの重要なステップである一貫した量子状態転送を可能にします.
科学分野:
- 量子コンピューティング
- 超伝導回路について
- 量子情報処理 量子情報処理
背景:
- 超伝導回路は,量子コンピュータにおける量子ビット (量子ビット) の主要候補である.
- シングル・クビット操作は日常的ですが,任意のゲート操作のために遠くにあるクビットをつなぐことは依然として課題です.
- 既存の方法は主に局所的な相互作用に依存しており,スケーラビリティを制限しています.
研究 の 目的:
- 遠隔の超伝導量子ビットをつなぐためのスケーラブルな方法を示すために.
- 量子情報を配布するための量子バスアーキテクチャを実装する.
- チップ上の隣接しない量子ビット間の一貫した量子状態転送を可能にする.
主な方法:
- 送電線の空洞を利用して,マイクロ波光子を閉じ込め,量子バスとして作用した.
- この量子バスを通じて,チップの反対側に位置する2つの超伝導クビットをカップリングします.
- 仮想光子によるクビットカップリングと媒介された相互作用をダイナミックに切り替えるための高速クビット制御を採用しました.
主要な成果:
- 2つの超伝導量子ビット間の量子状態の一貫した移転が成功裏に実証されました.
- 量子バスでは,仮想フォトンを用いて相互作用を媒介し,空洞によって引き起こされる損失を軽減しました.
- この空洞は,複合制御と量子ビット状態の測定を容易にした.
結論:
- 実装された量子バスアーキテクチャは,遠隔の超伝導量子ビットを効果的にカップル化する.
- このアプローチは,一貫した量子状態移転を可能にし,2 キュービット以上までスケーラブルです.
- チップ上の量子情報処理のための魅力的なアーキテクチャを提示しています.
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