不規則な二極多体系における離散時間結晶秩序の観測
Soonwon Choi1, Joonhee Choi1,2, Renate Landig1
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|March 10, 2017
まとめ
科学者は 物質の新たな量子相を観察しました дискрет時間結晶の秩序を 駆動された無秩序なシステムで 強い相互作用によって保護されているこのエキゾチックな段階は,長寿の時間的な相関を示し,混乱に安定しています.
科学分野:
- 量子物理学
- 凝縮物質物理学
- 統計的メカニズム
背景:
- 量子力学を 均衡状態から離れて理解することは 重要な課題です
- 自律的同期と 動的相変化のような現象を 呈する.
- 孤立した多体システムの制御された操作は,非均衡相の研究を可能にします.
研究 の 目的:
- 制御された無秩序な量子システムにおける 離散的な時間結晶の秩序を 実験的に観察する
- このエキゾチックな段階の安定化における強い相互作用の役割を調査する.
- 物質のダイナミックな相を探求し 相互作用し 乱れた多体系を制御する
主な方法:
- 室温でダイアモンドの二極スピン不純素を駆動し,乱れた集合体における時間的な相関の実験観察.
- 観測された時間結晶秩序の相境界の特徴.
- 混乱と熱化に対する時間秩序の安定性の分析.
主要な成果:
- ~100万個の二極回転の不純物質のシステムにおける離散的な時間結晶の観測.
- 長期間の相関を検知し 離散的な時間翻訳の対称性を破る
- 段階の境界を特定し,強い相互作用が時間的な順序を守っていることを確認します.
結論:
- この研究は,室温で乱れた量子システムにおける 離散的な時間結晶の秩序を 実験的に実証しています
- 強い相互作用は この新しい段階の物質を保護するために不可欠です
- 新しいダイナミック・フェーズを探求し 複雑な量子システムを制御する 道を切り開きます
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