论文标题
传统和分形的量子旋转液体的光谱指纹
Spectroscopic fingerprints of gapped quantum spin liquids, both conventional and fractonic
论文作者
论文摘要
我们解释了如何使用多维相干光谱技术对常规和“分形”的量子自旋液体进行实验诊断。 “常规”间隙量子自旋液体（例如$ Z_2 $旋转液体）在线性响应中没有明确的签名，但在非线性响应中确实具有清晰的指纹，可以通过已经存在的两维相干光谱的实验技术访问。 I型Fracton相（例如X-Cube）（令人惊讶的是）甚至更容易区分，即使在线性响应中也具有强烈暗示的特征，并且在非线性响应中具有明确的特征。 II型Fracton系统，例如Haah的代码，最微妙，可能需要考虑高阶非线性响应以进行明确的诊断。
We explain how gapped quantum spin liquids, both conventional and 'fractonic', may be unambiguously diagnosed experimentally using the technique of multidimensional coherent spectroscopy. 'Conventional' gapped quantum spin liquids (e.g. $Z_2$ spin liquid) do not have clear signatures in linear response, but do have clear fingerprints in non-linear response, accessible through the already existing experimental technique of two dimensional coherent spectroscopy. Type I fracton phases (e.g. X-cube) are (surprisingly) even easier to distinguish, with strongly suggestive features even in linear response, and unambiguous signatures in non-linear response. Type II fracton systems, like Haah's code, are most subtle, and may require consideration of high order non-linear response for unambiguous diagnosis.
