在有限的隔离交互的花系统中缺乏热化.
Karthik Seetharam1, Paraj Titum1,2, Michael Kolodrubetz3,4,5
1Institute for Quantum Information and Matter, Caltech, Pasadena, California 91125, USA.
概括
孤立的交互周期驱动系统可以避免无特征的无限温度状态. 清洁系统中的有限系统大小导致非热Floquet固有状态,由新兴的整合性驱动.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子动力学 量子动力学是什么?
- 统计力学 统计力学
背景情况:
- 交互周期驱动 (Floquet) 系统通常在很长一段时间内演变为无特征的最大状态.
- 在这种系统中,通常需要异常或特定的驱动频率来实现非热行为.
- 了解长时间动态对于量子控制和信息处理至关重要.
研究的目的:
- 在干净,隔离,定期驱动的交互系统中调查非热行为.
- 探索有限系统大小在Floquet系统的长期动态中的作用.
- 确定阻止系统达到无特征最大状态的机制.
主要方法:
- 一个无旋转费米子与近邻相互作用的单维系统的理论分析.
- 专注于没有静态组件的驱动交互项.
- 检查弗洛克特固态和准能量频谱.
主要成果:
- 由于有限尺寸效应,即使在干净的系统中,Floquet固有状态也表现出非热性行为.
- 准能量频谱显示了空白.
- 弗洛克特特有态的很大一部分显示了所有类能量的非热平均双重密度.
- 大相互作用强度的新兴整合性被确定为这种行为的原因.
结论:
- 有限系统大小可以在干净的Floquet系统中诱导非热行为,挑战常规智慧.
- 新兴的整合性起着关键作用,其分解取决于系统大小.
- 这一发现为在驱动系统中实现异常量子状态开辟了新的途径.
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