非对称的量子多体痕 量子多体痕
Lorenzo Gotta1,2, Sanjay Moudgalya3,4, Leonardo Mazza2
1Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva, Switzerland.
Physical review letters
|November 24, 2023
概括
量子多体痕 (QMBS) 表现出非热的行为. 新的"非对称QMBS"状态显示了类似QMBS的属性,即使不是精确的自身状态,也显示了量子自旋模型中隐藏的非热特征.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质理论 凝聚物质理论
- 统计力学就是统计力学.
背景情况:
- 量子多体痕 (QMBS) 是量子系统中具有低纠的特殊状态.
- 精确的QMBS是哈密尔顿式的固态,表现出独特的非热性质.
研究的目的:
- 调查模仿 QMBS 行为而不完全为固有状态的状态的存在和属性.
- 探索QMBS签名如何表现在量子自旋模型的更广泛的能量谱中.
主要方法:
- 量子格子旋转模型的理论分析.
- 能量固有状态的叠加构建新的状态.
- 使用旋转-1XY模型进行数值模拟.
- 对扰乱模型进行分析,以评估其稳定性.
主要成果:
- 标识 识别 识别 识别 识别
- 无对称的 QMBS 系统.
- 由叠加构成的低纠状态.
- 这些状态在热力学极限中表现出消失的能量方差和分离的放松时间.
- 非对称的QMBS与精确的QMBS直角,并在热谱中显示非热特征.
结论:
- 类似于QMBS的现象可以存在于精确的固有状态之外,存在于光谱的热部分.
- 精确的QMBS的存在会影响整个光谱,从而产生非对称的QMBS.
- 非对称的QMBS提供了一种途径,可以观察量子系统中的非热行为,即使在扰动下.
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