フロッケ対称性で保護されたトポロジック相のデジタル量子シミュレーション
Xu Zhang1, Wenjie Jiang2, Jinfeng Deng1
1Department of Physics, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Interdisciplinary Center for Quantum Information, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Zhejiang University, Hangzhou, China.
Nature
|July 21, 2022
まとめ
研究者はフローケの対称性保護トポロジカルフェーズと呼ばれる物質の新しい量子フェーズをデジタルでシミュレートしました. これらの非均衡状態は 超伝導量子ビットにおける 強力な時間相関とサブハーモニー反応を示します
科学分野:
- 量子物理学
- 凝縮物質物理学
- 非均衡システム
背景:
- 均衡熱力学は 量子多体系で多くの異様な現象を 禁止している.
- 離散時間結晶は,さまざまな実験プラットフォームで観察された駆動系における時間翻訳対称性を破ります.
- 新しい非均衡状態の探求は 量子物質の理解に不可欠です
研究 の 目的:
- デジタル量子シミュレーションを用いてフロケット対称性保護のトポロジカルフェーズを観察し,特徴づけること.
- プログラム可能な超伝導量子ビットシステムにおける これらの非均衡状態の性質を調査する.
- エキゾチックな量子相の研究のためのデジタルシミュレーションアプローチを確立する.
主な方法:
- デジタル量子シミュレーションを プログラム可能な超伝導量子ビットで実装した.
- 量子回路の深さは240回を超え 26個の量子ビットを含んでいます
- 複数の運転サイクルにおけるエッジスピンの時間的な相関とサブハーモニー反応を観察する.
主要な成果:
- フロケの対称性で保護されたトポロジカルフェーズに特徴的な堅固で長寿命の時間相関の観測.
- 初期量子状態とは無関係なエッジ・スピンにおける サブハーモニック・タイムレスポンスの検出
- フロッケ対称性で保護されたトポロジカルと熱的相の相境界の実験マッピング.
結論:
- エキゾチックな非均衡相の実現と研究のためのデジタル量子シミュレーションの実現可能性を示した.
- フローケの対称性で保護されたトポロジカルフェーズの頑丈さと特性を確認した.
- 複雑な量子現象の探索のための現在のノイイシー・インターミディアム・スケール・量子プロセッサ (NISQ) の可能性を強調した.
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