论文标题
非线性泵探针光谱中的分数统计符号
Signatures of fractional statistics in nonlinear pump-probe spectroscopy
论文作者
论文摘要
我们表明，可以从非线性光谱量中推断出在二维系统的激发光谱中的任何人的存在。特别是，我们考虑了泵探针光谱，其中样品被两个光脉冲辐射，它们之间的时间延迟可调节。相关的响应系数表现出一种通用形式，该形式源自第二个脉冲编织围绕第二个由第二个脉冲创建的人所获得的统计阶段。这种行为被非普遍的物理学（包括非统计相互作用和较小的非零温度）在质上没有变化。在磁系统中，可以使用当前可用的Terahertz域探针来测量感兴趣的信号，从而突出了非线性光谱技术在寻找量子自旋液体中的潜在有用性。
We show that the presence of anyons in the excitation spectrum of a two-dimensional system can be inferred from nonlinear spectroscopic quantities. In particular, we consider pump-probe spectroscopy, where a sample is irradiated by two light pulses with an adjustable time delay between them. The relevant response coefficient exhibits a universal form that originates from the statistical phase acquired when anyons created by the first pulse braid around those created by the second. This behaviour is shown to be qualitatively unchanged by non-universal physics including non-statistical interactions and small nonzero temperatures. In magnetic systems, the signal of interest can be measured using currently available terahertz-domain probes, highlighting the potential usefulness of nonlinear spectroscopic techniques in the search for quantum spin liquids.
