通过高阶相关性对量子多体系统进行实验性描述
Thomas Schweigler1, Valentin Kasper2, Sebastian Erne1,2
1Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria.
Nature
|May 19, 2017
概括
研究人员测量了量子超流体中的高阶相关性,揭示了系统的复杂性,并模拟了正弦-戈登模型. 这种先进的技术提供了一种分析量子多体系统的一般方法.
科学领域:
- 量子物理学
- 多体系统
- 量子模拟
背景情况:
- 量子系统具有复杂的相关性, 对于理解它们的特性至关重要.
- 高阶相关性提供了比低阶相关性更深入的见解,但在实验上不那么深入.
- 测量相关函数是验证和描述量子模拟的关键.
研究的目的:
- 在量子多体系统中实验测量高阶相关函数.
- 分析这些关联的因数分解属性.
- 描述量子系统及其与理论模型的关系.
主要方法:
- 研究了一对道合的单维原子超流体.
- 测量相位相关函数高达干扰模式的第十级.
- 分析了相关函数的分解成较低的顺序.
主要成果:
- 成功提取到第十级的相位相关函数.
- 确定了这些高阶关联因子化的条件.
- 描述了系统属性,准粒子,相互作用和真空.
结论:
- 实验系统作为热平衡中的正弦-戈登模型的量子模拟器.
- 高级相关性测量为分析量子多体系统提供了通用且强大的方法.
- 这种技术适用于密度,旋转和磁化等各种可观测值.
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