Measuring the imaginary-time dynamics of quantum materials
Measuring the imaginary-time dynamics of quantum materials
复制标题
测量量子材料的虚时间动力学
DOI：
10.1080/14786435.2020.1768604
复制
发表时间：
2020
影响因子：
1.6
通讯作者：
Kivelson, S. A.
中科院分区：
文献类型：
--
作者：
Lederer, S.;Jost, D.;Böhm, T.;Hackl, R.;Berg, E.;Kivelson, S. A.
理论分析通常涉及时间相关函数。从这些信息推断实时动态响应函数是非常困难的。然而，正如我们在这里所阐明的，从（实时）响应函数的测量频率依赖性来计算实时衰减器是很简单的。除了便于理论和实验之间的比较，所提出的方法可以是有用的，在提取某些方面的（长时间弛豫）动态从一个复杂的数据集。我们说明了这一点与分析推断从拉曼散射光谱的铁基超导体，其中包括一个新的方法，用于确定一个假定的量子临界贡献的响应。
Theoretical analysis typically involves imaginary-time correlation functions. Inferring real-time dynamical response functions from this information is notoriously difficult. However, as we articulate here, it is straightforward to compute imaginary-time correlators from themeasuredfrequency dependence of (real-time) response functions. In addition to facilitating comparison between theory and experiment, the proposed approach can be useful in extracting certain aspects of the (long-time relaxational) dynamics from a complex data set. We illustrate this with an analysis of the nematic response inferred from Raman scattering spectroscopy on the iron-based superconductor, which includes a new method for identifying a putative quantum-critical contribution to that response.
影响因子：
1.4
作者：
Gallais, Yann;Paul, Indranil
通讯作者：
Paul, Indranil
影响因子：
19.6
作者：
Kretzschmar, F.;Boehm, T.;Hackl, R.
通讯作者：
Hackl, R.